PDR-xxxxxxxxx Polarization Diverse Receivers

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Product Information

Specifications

• Product Name: Polarization Diverse Receivers (PDR)
• Wavelengths: 1060nm, 1310nm, 1550nm
• Pigtail Length: 0.5m, 1m
• Reference Input: SM, PM
• Connector Options: None, FC/APC, SC/APC, LC/APC

Product Usage Instructions

Overview

G&H’s Polarization Diverse Receivers (PDR) are designed for
high-performance and reliable signal detection at specific
wavelengths. They provide accurate polarization analysis and
splitting for various applications.

Installation

1. Choose the appropriate wavelength and pigtail length based on
your requirements.

2. Connect the PDR to the reference input using the preferred
connector option.

3. Ensure proper alignment and secure connection of the
components.

Signal Detection

1. Power on the system and activate the PDR.

2. The PDR will analyze the S and P states of polarization of
the incoming signal for accurate detection.

3. Monitor the output for reliable signal interpretation.

Maintenance

1. Periodically check the connections and cleanliness of the
components.

2. Keep the PDR in a clean and dust-free environment to ensure
optimal performance.

3. Follow any specific maintenance instructions provided in the
user manual.

FAQ

Q: What are the key features of G&H’s Polarization Diverse

Receivers?

A: The PDR offers superior performance, compact
design, hermetic sealing, accurate polarization analysis, and
polarization state splitting for high-quality signal detection.

Q: How many channels are available for polarization diverse

detection in the PDR?

A: The PDR provides four channels (S+, S-, P+,
and P-) for polarization diverse detection with common mode
rejection.

Q: Where are G&H’s fiber optics and devices

manufactured?

A: G&H’s fiber optics and devices are
produced in their engineering and manufacturing centers located in
Torquay, UK.

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G&H: A PHOTONICS SPECIALIST

G&H solves complex challenges for our customers by developing innovative photonics solutions that enhance performance, reliability, and efficiency. We are an award-winning name in the photonics industry with global reach and an established heritage dating back 75 years.
Emerging applications increasingly employ photonics as the enabler. Our customers require specialized, reliable and highperformance solutions. G&H pushes the boundaries in these key areas and provides differentiating product solutions. We maintain close and long-lasting relationships with our customers.

Aerospace & Defense

G&H is a photonics technology business headquartered in Ilminster Somerset, UK with operations in the USA and Europe.

Industrial & Telecom

A BETTER WORLD WITH PHOTONICS.

Gooch & Housego PLC Dowlish Ford, Ilminster
TA19 0PF , UK
Contact us: +44 1460 256440 [email protected]
gandh.com

Life Sciences

BROAD GLOBAL EXPERTISE

Made in the UK

Made in the USA

Ilminster, UK
49,679 ft² 4,615 m²

Fremont, USA
40,000 ft² 3,716 m²

Keene, USA
12,800 ft² 1,189 m²

Cleveland, USA
80,000 ft² 7,432 m²

Rochester, USA
43,226 ft² 4,015 m²

Moorpark, USA
50,000 ft² 4,645 m²

Plymouth, UK
22,000 ft² 2,043 m²

Torquay, UK
41,000 ft² 3,850 m²

St. Asaph, UK
9,149 ft² 850 m²

Ashford, UK
30,000 ft² 2,787 m²

G&H employs over 1,000 skilled employees across 10 manufacturing and design facilities. We also have 3 sales offices and a contract manufacturing partner in Thailand.

MANUFACTURING CAPABILITIES
Table of Contents
Polarization diverse receivers………………………… Page 5 The award-winning Fiber-Q®…………………………. Page 6 Ruggedized couplers (HI-REL)……………………….. Page 8 High power couplers………………………………………… Page 9 SM couplers………………………………………………………. Page 10 PM couplers………………………………………………………. Page 11 Wideband couplers…………………………………………… Page 12 Variable optical delay line……………………………….. Page 13 OEM modules & sub-systems…………………………. Page 14
G&H FIBER-OPTICS
Since 1985, G&H has produced top-quality fiber optics and devices, including components for undersea, aerospace, and defense applications.
With engineering and manufacturing centers in Torquay, UK, G&H’s renowned photonic engineering services and expertise ensure that their fiber optic products are durable, reliable, and designed to withstand extreme conditions.
Guaranteed to never fail, G&H’s fiber optic products are made possible by the experience and expertise of the centers’ advanced engineers and technicians.

POLARIZATION DIVERSE RECEIVERS

Superior performance, compact design, and hermetic sealing G&H’s Polarization Diverse Receivers (PDR) are the perfect solution for high-performance and reliable signal detection at wavelengths of 1060, 1310, or 1550 nm.
Our PDRs mix an incoming signal with a reference (local oscillator), effectively shifting any phase and amplitude fluctuations on the optical carrier to a carrier at an electronic frequency.

PDR-xxxxxxxxx

Wavelength (nm) 1060, 1310, 1550

Pigtail length (m) 0.5, 1

Reference input SM, PM

Connector
None, FC/APC, SC/APC, LC/APC

4 | [email protected] G&H

ACCURATE POLARIZATION
ANALYSIS
Using a pair of balanced detectors, our PDRs analyze the S and P states of polarization of the mixed signal, ensuring that the signal is accurately detected and interpreted.
Housed in a compact, hermetically sealed package, our PDRs feature direct electrical connections to their four photodiodes, making them easy to use and maintain.

POLARIZATION STATE
SPLITTING
The PDR works by first splitting the sample and reference signals with a non- polarizing beam-splitter, followed by polarization state splitting with a polarizing beam-splitter.
This process results in four channels (S+, S-, P+, and P-) that allow polarization diverse detection with common mode rejection, ensuring that the detected signals are of the highest quality and reliability.

Visit www.gandh.com/products/fiber-optics/polarization-diverse-receivers

| 5

FIBER-Q®
Combining micro-optical packaging capabilities and acousto-optic expertise The award-winning Fiber-Q® series of fiber-coupled acousto-optic modulators is an elegant and robust solution for amplitude modulation of fiber and fiber- coupled lasers. With direct control over timing, intensity, and temporal shape of laser output, Fiber-Q® offers a high extinction ratio, low insertion loss, and excellent stability in both polarization-maintaining (PM) and non-PM formats at modulation frequencies up to 80 MHz for visible and infrared wavelengths.
Rugged, reliable design for seamless integration Built for reliability, the rugged hermetic design of Fiber-Q® ensures a compact, low-profile package that is ideal for easy integration into all-fiber and OEM systems, including medical laser systems. Additionally, Fiber-Q® provides a wider variety of pulse shapes, enabling more precise control over the temporal characteristics of the active output from a fiber laser. Its fast switch speed, high peak diffraction efficiency, and reliable performance make it a critical component in many amplified systems.
Versatile and efficient modulation in multiple wavelengths Fiber-Q® is available in wavelengths ranging from 400-2000 nm, hermetic and non-hermetic versions, and three port versions in addition to the standard two port. With its growing list of applications, Fiber-Q® continues to deliver stable high- efficiency performance and superior machining effects.

APPLICATIONS
The Fiber-Q® has a wide range of applications in industries such as industrial laser materials processing, biomedical, and sensing applications. In industrial laser materials processing, Fiber-Q® is used for welding, cutting, drilling, and surface treatment, where precise control over the laser output is critical. Fiber-Q® is also used in medical laser systems for applications such as tissue ablation, cancer treatment, and dermatology. Its high stability, low insertion loss, and direct control over laser output make it a critical component in these systems. With the visible range of Fiber-Q® products, more compact allfiber instrument designs are now possible in biomedical applications such as microscopy and flow cytometry.
Fiber-Q® is the result of G&H’s core area of expertise in acousto-optics, combined with micro-optical packaging capabilities, to produce a market- leading device. With its growing list of applications, Fiber-Q® delivers stable high-efficiency performance and superior machining effects.
6 | [email protected] G&H

AWARD-WINNING PACKAGING
G&H Torquay’s expertise in photonic packaging led to the development of Fiber-Q® and received the Institute of Physics Award for Innovation, followed by the Queen’s Award for Enterprise: Innovation in 2016. Since its introduction in 2009, the list of applications has grown, including industrial laser materials processing, biomedical, and sensing applications.

FIBER-Q®
450nm 200MHz
532nm 200MHz
633nm 200MHz Fiber Coupled AOM
780nm, 150MHz Fiber Coupled AOM
PM 1060nm 200MHz Hermetic Fiber Coupled AOM 1060nm 150MHz Non-Hermetic Fiber Coupled AOM PM 1060nm 150MHz Hermetic Fiber Coupled AOM 1060nm 150MHz Hermetic Fiber Coupled AOM 1060nm 200MHz Non-Hermetic Fiber Coupled AOM

Product code
S-M200-0.4C2A-3-F2P, S-M200-0.4C2A-3-F2S
S-M200-0.4C2C-3-F2P, S-M200-0.4C2C-3-F2S
S-M200-0.4C2E-3-F2P, S-M200-0.4C2E-3-F2S
T-M150-0.5C2W-3-F2P, T-M150-0.5C2W-3-F2S

Wavelength Pigtail

(nm)

type

450

PM, SM

532

PM, SM

633

PM, SM

780

PM. SM

Rise / fall Frequency

time (ns)

(MHz)

25

200

25

200

25

200

50

150

T-M200-0.1C2G-3-F2P 1030-1090 PM

10

200

S-M150-0.4C2G-3-F2S

1060

SM

30

150

T-M150-0.4C2G-3-F2P

1060

PM

30

150

T-M150-0.4C2G-3-F2S

1060

SM

30

150

S-M200-0.1C2G-3-F2P

1060

SM

10

200

1060nm 200MHz Fiber Coupled AOM

T-M200-0.1C2G-3-F2S

1060

SM

10

200

1060nm 300MHz Hermetic Fiber Coupled AOM

T-M300-0.1C2G-3-F2P, T-M300-0.1C2G-3-F2S

1060

PM, SM

6

300

PM 1550nm 110MHz Hermetic Fiber Coupled AOM

T-M110-0.2C2J-3-F2P

1550

PM

25

110

1550nm 110MHz Hermetic Fiber Coupled AOM

T-M110-0.2C2J-3-F2S

1550

SM

25

110

PM 1550nm 200MHz Hermetic FiberCoupled AOM

T-M200-0.1C2J-3-F2P

1550

PM

10

200

1550nm 200MHz Hermetic FiberCoupled AOM

T-M200-0.1C2J-3-F2S

1550

SM

10

200

1550nm Fiber Coupled AOM

T-M300-0.1C16J-3-F2P

1550

PM

6

300

PM 1550nm, 40MHz (AMTIR)

T-M040-0.5C8J-3-F2P

1550

PM

100

40

1550nm 40MHz (AMTIR)

T-M040-0.5C8J-3-F2S

1550

SM

100

40

PM 1550nm 80MHz Hermetic FiberCoupled AOM

T-M080-0.4C2J-3-F2P

1550

PM

35

80

1550nm 80MHz Hermetic Fiber Coupled AOM

T-M080-0.4C2J-3-F2S

1550

SM

35

80

PM Polarization Maintaining 1550nm

Hermetic Fiber Coupled AOM, 80MHz

T-M080-0.5C8J-3-F2P

1550

PM

100

80

(Low Power Consumption)

1550nm Hermetic Fiber Coupled AOM, 80MHz (Low Power Consumption)

T-M080-0.5C8J-3-F2S

1550

PM

100

80

2000nm (2µm) 250 MHz Fiber Coupled AOM

T-M250-0.3C16Z-3-F2P

2000

PM

20

250

PM 2000nm 80MHz Hermetic Fiber Coupled AOM

T-M080-0.3C2Z-3-F2P

2000

PM

100

80

2000nm 80MHz Hermetic Fiber Coupled AOM

T-M080-0.3C2Z-3-F2S

2000

SM

100

80

For more, visit www.gandh.com/products/fiber-optics/fiber-q-fiber-coupled- modulators

| 7

RUGGEDIZED COUPLERS

Proven performance and reliability for undersea and space applications The G&H line of HI-REL components are deployed in environments such as undersea and space where the costs of component replacement are prohibitive and reliability is of premier concern. G&H is established as a preferred supplier of these components to most major undersea telecommunications equipment manufacturers. Our HI REL capability is built upon the foundation of an extended history of also manufacturing very reliable components for landbased (or terrestrial) systems in volume.

Ultra-low loss The ultra-low loss of G&H fused fiber components helps to promote low noise figure and improved system margin in undersea transmission systems. Components are supplied in regular (bare fiber), semi-ruggedized (0.9 mm sleeving) or custom housings, depending on the installation environment. The newest addition to the range is our pump combiner, which allows erbium- doped fiber amplifier (EDFA) designers to double pump powers. This enables higher power EDFAs and in turn greater data carrying capacity.

High reliability fused coupler, 980nm band High reliability C or L band fused coupler High reliability pump signal WDM High reliability pump signal WDM High reliability pump combiner

Function Tap coupler
4x14mm WDM WDM
Combiner

Wavelength 980nm
C, L-band 980nm, C-band 1480nm, C-band
980nm

APPLICATIONS
In space applications, photonics is expected to displace current RF/microwave satellite technology for transport of data between satellites, and between satellites and the Earth. In addition to offering higher data carrying capacity than the present radio wave systems, the reduced size and weight of optical systems will enable smaller, lighter next generation satellites. The G&H HI REL space range of fused fiber components builds on the quality and reliability for which our undersea couplers are known, adding features such as material lot unicity, qualification in high radiation environments and lot validation testing. Services for HI REL customers include custom qualification programs, dedicated workstations, full traceability of materials and processing, advanced fiber management, and customerspecific validation tests.

HI REL TESTING FACILITIES
G&H has established full reliability testing facilities to carry out customer specific HI REL qualification programs, which can include accelerated aging and Weibull analysis. Failure rates for undersea telecommunication systems and components are often described using a FIT rate (Failures in Time). The fused fiber couplers from our HI REL coupler range offer a very low 0.1 FIT rate, equivalent to one failure in roughly fifty thousand components in 25 years.

8 | [email protected]

For more, visit gandh.com/products/fiber-optics/ruggedized-couplers

HIGH POWER COUPLERS

The highest performance fused fiber couplers and high power combiners Our precise fusion techniques form the basis for our range of multimode pump combiners, designed for pumping high-power fiber lasers. To meet the demands of complex fiber amplifier designs, we have developed a signal feedthrough fiber at the center of the multimode fiber bundle, which is both single-mode and polarization-maintaining. Our product line includes Nx1 multimode combiners as well as N+1×1 combiners with a signal feedthrough fiber, with standard components available in 3×1, 7×1, 2+1×1, and 6+1×1 configurations. Additionally, all variants are available with custom pump, signal, and output fibers to meet specific application requirements. To streamline integration into beam delivery systems, output fiber pigtails can be directly integrated into the system.
High power multi-mode pump combiners Our range of pump combiners for high power fiber lasers is based on precise fusion of multimode fiber techniques. For pumping of complex fiber amplifier designs, we have developed a signal feedthrough fiber at the center of the multi-mode fiber bundle, which is both single-mode and polarization-maintaining. All variants are available with custom pump, signal, and output fibers.

6+1X1 Power Combiner with signal feedthrough 6+1X1 Power Combiner with PM signal feedthrough 2+1×1 Power Combiner with PM signal feedthrough 2+1×1 Power Combiner with signal feedthrough 2+1×1 Power Combiner with active PM signal feedthrough 2+1×1 Power Combiner with active signal feedthrough 2+1×1 Power Combiner with active signal feedthrough

Function N+1×1 N+1×1 N+1×1 N+1×1 N+1×1 N+1×1 N+1×1

Wavelength (nm) 900-1000, 1064, 1550 900-1000, 1064, 1550 900-1000, 1064, 1550 900-1000, 1064, 1550 900-1000, 1064, 1550 900-1000, 1064, 1550
900-1000

For more, visit www.gandh.com/products/fiber-optics/high-power-combiners

gandh.com | 9

SM COUPLERS

Accurate monitoring and splitting of optical signals G&H single-mode couplers are a reliable choice for accurate monitoring and splitting of optical signals, with a range from 1% to 50%. In addition, we offer Wavelength Division Multiplexers (WDMs) for multiplexing and demultiplexing optical signals at different wavelengths. Our couplers and WDMs are available in both standard and polarizationmaintaining (PM) versions, including slow axis, fast axis, and axis-independent variants.

Fixed attenuator Dual window wideband coupler Visible wavelength coupler Near infrared coupler Ultra low ratio tap coupler Fused coupler NXN fused coupler Fused coupler, C or L band Subminiature tap coupler Fused coupler, C+L or S band 3×1, 4×1 High temperature coupler >250°C Visible wavelength combiner Near infrared WDM 2µm WDM Fused pump signal WDM Subminiature pump signal WDM Duplexing WDM, 1×2 or 2×2 Fused pump signal WDM Low reflection termination

Function Attenuator Tap coupler Tap coupler Tap coupler Tap coupler Tap coupler Tap coupler Tap coupler Tap coupler Tap coupler Tap coupler Tap coupler, WDM
WDM WDM WDM
WDM WDM WDM WDM Termination

Wavelength Various
1310nm, C-band 400-700nm 700-1200nm 700-1600nm 980nm, 2µm
980, 1310, S, C, L-band C, L-band
C, L, C+L, S-band C+L, S-band 400-2000nm 400-2000nm 400-700nm 700-1199nm 2µm
980nm, C, L, C+L-band 980nm, C, L, C+L-band
1310nm, C, L-band 1480nm, C, L-band 1310nm, C, L-band

VOLUME PRODUCTION
At G&H, we have extensive experience in the volume production of fused fiber components for telecommunications deployment. We offer customization of any of our designs to meet the needs of volume OEM applications, and our engineers are experts in designing custom products to meet our customers’ unique needs. Whether it is for couplers, WDMs, or any other fiber optic component, we are committed to providing highquality products and exceptional service.

10 | [email protected]

For more, visit gandh.com/products/fiber-optics/sm-couplers

PM COUPLERS
Accurate monitoring and splitting of PM optical signals G&H offers a range of fiber optic components for accurate monitoring and splitting of optical signals. Our polarization-maintaining (PM) couplers, including slow axis, fast axis, and axisindependent variants, are available in ratios from 1% to 50%, and are manufactured using industry-standard fiber. We also offer a variety of other components, including combiners, taps, attenuators, and wavelength division multiplexers (WDMs), all of which are designed for maximum efficiency and reliability.

PM combiner 2+1×1 power combiner with PM signal feedthrough, 2 m 6+1×1 power combiner with signal feedthrough, 2 m High power connectors and patchcords PM coupler PM bow tie fiber coupler Axis-matched low ratio tap Ultra low ratio tap coupler 3×1, 4×1 Fixed attenuator PM WDM Low reflection termination

Function Combiner
N+1×1 N+1×1 Connectors Tap coupler Tap coupler Tap coupler Tap coupler Tap coupler Attenuator WDM Termination

Wavelength 980, 1060, 1450, 1550, 1650 nm
750-850, 2000nm 750-850, 2000nm
750-2100nm 400-2000nm 900-1200nm
900-1600nm 900-1700nm 400-2000nm 400-2000nm 750-1600nm, 2µm 1310nm, C, L-band

VOLUME PRODUCTION
With our extensive experience in volume production of fused fiber components for telecommunications deployment, we can customize any of our designs to meet the needs of volume OEM applications. Our engineers routinely apply their knowledge to design custom products for our customers, ensuring that they receive the highest quality, most reliable components for their specific needs.

For more, visit www.gandh.com/products/fiber-optics/pm-couplers

gandh.com | 11

WIDEBAND COUPLERS
Wideband couplers for high-resolution imaging in OCT systems In the OCT light engine, fiber optic wideband couplers are used to form the interferometer that generates depth information.
G&H’s wideband couplers provide accurate monitoring and splitting of optical signals over a broad range of wavelengths, ensuring that the OCT system can generate precise depth information for high-resolution imaging.
Our couplers are designed to meet the demanding requirements of OCT systems and offer excellent performance, reliability, and accuracy.
Wideband optical couplers The 1060 nm Wideband OCT Coupler offers uniform performance over a 50 nm wavelength range, making it ideal for high-end OCT instruments.
With its precise fusion of fibers, this coupler allows for accurate monitoring and splitting of optical signals. The 1060 nm wavelength is particularly suitable for imaging the retina, providing high-resolution images with excellent contrast and depth information.
For OCT systems that use both 850 nm and 1300 nm wavelengths, G&H offers the Wideband OCT Coupler. This coupler also has a bandwidth of 50 nm, providing uniform performance over a range of wavelengths.
The 850 nm and 1300 nm wavelengths are commonly used in OCT imaging of biological tissue, making this coupler an excellent choice for a wide range of medical applications.
Extremely wideband optical couplers G&H wideband couplers are designed to meet the increasing bandwidth requirements of the latest generation of optical coherence tomography (OCT) systems. Traditional retinal scanning systems use optical sources with a bandwidth of around 30 nm, but with the move towards higher resolution imaging, the latest OCT systems require a bandwidth of over 100 nm.
G&H has developed the Extremely Wideband Optical Coupler (EWOC) to meet this need, with uniform performance over a 140 nm wavelength range, making it an ideal choice for high-end and future generations of OCT instruments.

1060nm wideband OCT coupler 850 and 1300nm wideband OCT coupler 850, 1060, 1300nm extended wideband OCT coupler

Wavelength (nm) 1060
850, 1300 850, 1060, 1030

Bandwidth (nm) 50 50 200

12 | [email protected]

For more, visit gandh.com/products/fiber-optics/wideband-couplers

VARIABLE OPTICAL DELAY LINE

For high-performance optical coherence tomography (OCT) systems G&H’s Small Form-Factor Variable Optical Delay Line is an essential component for highperformance optical coherence tomography (OCT) systems. Our team of experts draws on extensive knowledge and experience in the design of custom OCT modules to provide a complementary set of key optical elements.
Interferometer reference arm Our optical delay line is designed to be used as an interferometer reference arm, offering stable optical performance over time, delay, and environmental conditions. This high-quality delay line enables precise control of the path length of the reference arm, allowing for accurate measurement of depth in OCT imaging.

Wavelength (nm)
850, 1060, 1310

Travel speed (mm/s)

Polarization control

None,

50

Faraday

rotator

Bandwidth (nm)
100

Port

Fiber sleeving Pigtail length

configuration

(mm)

(m)

0.5,

Single fiber,

Ø.9,

1,

Dual fiber

Ø2.0

1.5,

2

COMPACT FOR PORTAL SYSTEMS
Available in a compact, small form-factor design, our delay line is ideal for use in portable and handheld OCT systems.
The device features a variable delay range, allowing for greater flexibility and adaptability in a range of applications.

Visit www.gandh.com/products/fiber-optics/small-form-factor-variable-optical- delay-line

| 13

OEM MODULES & SYSTEMS
World-class expertise in fiber optics We are vertically integrated and offer fiber optic assemblies and custom sub-systems containing optoelectronics, driver circuitry, and firmware for biomedical, fiber sensing, and aerospace and defense. Some products are standard but most of our OEM customers have unique requirements and we are experienced in working with them to design and engineer the solution they need.
Vertical integration for supply chain simplification As a vertically integrated supplier, we offer supply chain simplification with a single source for design for manufacture and assembly (DFMA), engineering, test, manufacture, and integration. Even if we do not make all the subcomponents for your system, we are able to integrate third party components. All of our external suppliers have been through a rigorous qualification process with us, and we have confidence in our component suppliers. Thanks to our established buying power, design for manufacture focus, and continuous improvement, we can help customers overcome time to market and cost challenges.
High performance, flexible designs We understand our customers’ need for high performance, as well as flexibility in design. We have the ability to look at a customer’s schematic and know where the problems lay. We can help you to develop your system to get better image quality / resolution, speed, stability, smoothness, and reliability. For decades we have deployed integrated sub-systems, such as the critical fused fiber coupler, which was initially for the long-distance optical communications industry and is now available for OCT too. We have invested in R&D and listened to our customers’ needs, developing key components such as the optical delay line, polarization diverse receiver (PDR), and collimator for OCT interferometers, as well as sub-systems and fully bespoke OCT systems.

14 | [email protected] G&H

For more information, visit www.gandh.com/our-capabilities

gandh.com | 15

References

• Optics and Photonics | G&H
• G&H Couplers for Harsh Environments including Subsea and Space (HI REL Range)
• SM Couplers | Single Mode Couplers
• Wideband Couplers | Fiber optic couplers
• Our Capabilities As Photonics Experts
• Fiber-Q® Fiber-Coupled Acousto-Optic Modulator
• High Power Combiners | Fiber optic combiners
• PM Fiber Couplers
• Polarization Diverse Receivers
• Small Form-Factor Variable Optical Delay Line

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