gentec-EO 250-W Radiometers for Low Power Measurements User Manual
- June 4, 2024
- gentec-EO
Table of Contents
USER MANUAL
UM-B Series I Radiometers for Low Power Measurement
WARRANTY
First Year Warranty
The Gentec-EO thermal power and energy detectors carry a one-year warranty
(from the date of shipment) against material and /or workmanship defects when
used under normal operating conditions. The warranty does not cover
recalibration or damages related to misuse.
Gentec-EO will repair or replace at its option any wattmeter or joulemeter
which proves to be defective during the warranty period, except in the case of
product misuse.
Any unauthorized alteration or repair of the product is also not covered by
the warranty.
The manufacturer is not liable for consequential damages of any kind.
In the case of a malfunction, contact the local Gentec-EO distributor or the
nearest Gentec-EO office to obtain a return authorization number. Return the
material to the address below.
Contacting Gentec Electro-Optics Inc.
To help us answer your calls more efficiently please have the model number
of the detector you are using readily before calling Customer Support
All customers:
Gentec-EO, Inc.
445 St-Jean-Baptiste, Suite 160
Quebec, QC, G2E 5N7
Canada
Tel: 418-651-8003
Fax: 418-651-1174
Email: service@gentec-eo.com
Web: www.gentec-eo.com
GENERAL INFORMATION
1.1 INTRODUCTION
The Gentec-EO UM-B Series is a line of high-performance and high-accuracy pyroelectric wattmeters. Each unit is built for durability, compactness, and ease of operation.
The UM-B optical absorber exhibits a flat spectral response and a very low
reflection.
The UM9B-BL-D0 benefits from the use of a DB-15 male, “Smart Interface”
connector, containing an EEPROM (Erasable Electrical Programmable Read-Only
Memory) programmed with the calibration sensitivity, the spectral correction
factors at different wavelengths, and other data related to the specific UM-B
Series wattmeter head. This connector allows the monitor to automatically
adjust its setting to those of the wattmeter being connected. It also includes
a light tube attached to the housing that enhances immunity to radiated EMI
noise and minimizes the effects of air currents on the stability of
measurement
The UM9B-BL-D0 offers an exceptionally wide dynamic range from 300 nW to 25
mW. It is compatible with our MAESTRO, U-LINK, and M-LINK monitors. It must be
used with an Optical Chopper running at 10 +/- 1 Hz.
The UM9B-BL-L-D0 model is designed to be used with the APM (D) (201848) and
does not have the “Smart Interface” function. These wattmeters cannot be used
with a monitor. They must be used with an APM and an acquisition system, for
example, an oscilloscope, lock-in amplifier, or OEM signal acquisition system.
UM9B-BL-L-D0 is calibrated in V/W and is documented in the calibration
certificate of each unit.
The spectral correction is also documented in the “Personal wavelength
correction” certificate
1.2 UM9B-BL-D0 SERIES “SMART INTERFACE” CONNECTOR1
The DB-15 male “Smart Interface” connector contains an EEPROM (Erasable
Electrical Programmable Read-Only Memory) programmed with the calibration
sensitivity and other data related to the specific UM-
B wattmeter in use. Faster set-ups are obtained because the monitor
automatically adjusts to the characteristics of the wattmeter when the “Smart
Interface” is connected to the monitor.
The DB-15 “Smart Interface” connector pin-out is (see Fig. 1-1):
1- USED BY MONITORS
2- ” ” ” ”
3- ” ” ” ”
4- ” ” ” ”
5- ” ” ” ”
6- “+” SIGNAL OUTPUT
7- ‘’-’’ SUPPLY VOLTAGE UM-B ONLY
8- USED BY MONITORS
9- ‘’+’’ SUPPLY VOLTAGE UM-B ONLY
10- USED BY MONITORS
11- ” ” ” ”
12- ” ” ” ”
13- “-“ SIGNAL OUTPUT
14- USED BY MONITORS
15- ” ” ” ”
SHELL- COAX. SHIELD / BODY GRND
NOTE: Verify with Gentec-EO for supply voltage requirements.
DB-1 5 “Smart Interface” connector Pinout Fig. 1 —1
1.3 UM-B SERIES SPECIFICATIONS
The following specifications are based on a one-year calibration cycle, an
operating temperature of 15 to 28ºC and relative humidity not exceeding 80%
and a storage temperature from 5 to 45 ºC with relative humidity not exceeding
80%.
| UM9B-BL-D0| UM9B-BL-L-D0
---|---|---
Monitor Compatibility| MAESTRO, U-LINK, M-LINK (with the latest firmware
version only)| APM(D) only
NIG| 202024 (without stand)
202111 (with stand)| 202241
Effective Aperture Diameter| Ø9 mm
Sensor| Pyroelectric
Absorber| BL
Spectral Range| 0.1 – 20 µm
Calibrated Spectral Range| 0.248 – 2.5 µma| 633 nm
Max. Average Power| With MAESTRO: 20 mW With U-LINK or M-LINK: 25 mW| 200 µW
Max. Average Power Density| 50 mW/cm2
Power Noise Level (RMS)| 300 NW| 5 NW
Optical Chopper Frequency| 10 ± 1 Hz| 5 ± 1 Hz
Typical Rise time (0-95%)| < 0.2s
Typical sensitivity| 120 V/W| 20 000 V/W
Calibration Uncertainty| ± 4.0 % @ 1064 nm| ± 4.0 % @ 633 nm
Dimensions (mm)| Ø38.1 x 26.2| Ø38.1 x 26.2
Weight| 91 g
The calibrations at 2.1 to 2.5 µm and 10.6 µm are on special request only.
b Typical wavelength correction factors are provided for 0.19 to 2.1 µm
OPERATING INSTRUCTIONS
2.1 When used with a compatible monitor (UM9B-BL-D0)
Figure 2.1: UM9B-BL-D0 with monitor
Refer to the user manual of each monitor for further information.
2.1.1 General Instructions
1- Place the wattmeter on its optical stand (Must use a Delrin post).
2- Connect the wattmeter to a compatible Gentec-EO laser power monitor (see
Fig. 2-1).
(Refer to specifications)
NOTE: The parameters programmed in the DB-15 “Smart Interface” are for a
1 MΩ load impedance.
3- Remove the detector’s protective cover, when applicable.
4- Put the optical chopper (SDC-500 or equivalent) into the laser beam path
and adjust the frequency at 10Hz (laser beam must be contained within the
aperture).
5- Put the wattmeter head into the laser beam path after the chopper. Make
sure the laser beam is aligned to the center of the 9 mm detector area.
CAUTION: Be careful not to exceed the maximum levels and/or average
power densities specified in the specification table.
NOTE: As with all pyroelectric devices, these detectors have some
position and beam size linearity. For the most accurate measurements, the beam
should be centered on the sensor surface.
2.2 Working at other wavelengths than 1.064µm with the UM9B-BL-D0
The monitor will automatically configure himself using the data stored in the
EEPROM of the DB-15 “Smart Interface”. This includes the calibration
sensitivity and wavelength corrections for 20 current wavelengths 2, 3.
.For more precise measurements with a UM-B Series wattmeter at wavelengths
other than those already corrected by the “Personal wavelength correction TM 2
’’ data programmed into the “Smart Interface”, a correction factor 3 is
automatically set in the monitor to compensate for the change in sensitivity
of the wattmeter caused by the change in the absorption of the optical
absorber at different wavelengths. This automatic correction is a linear
interpolation between two measured values of the ‘’Personal wavelength
correction’’.
2 Refer to the spectral curve of the “ Personal Wavelength CorrectionTM “
certificate supplied with the wattmeter
3 Refer to the monitor manuals for instructions.
2.3 When using an oscilloscope (UM9B-BL-L-D0):
Figure 2.2: UM9B-BL-L-DO with an oscilloscope
2.3.1 General Instructions
-
Install the wattmeter on its optical stand using a Delrin post.
-
Connect the wattmeter to the APM and switch it on. (Battery or power supply needed)
-
Connect the APM to the oscilloscope.
NOTE: The required load impedance is 1 MΩ and ≤ 30 pF. -
Put the optical chopper (SDC-500 or equivalent) into the laser beam path and adjust the frequency to 5 Hz (laser beam must be contained within the aperture).
-
Put the wattmeter head into the laser beam path after the chopper (laser beam must be contained within the aperture).
CAUTION: Be careful not to exceed the maximum levels and average power density specified for this detector.
NOTE: As with all pyroelectric devices, these detectors have some position and beam size sensitivity. For the most accurate measurements, the beam should be centered on the sensor surface. -
Adjust the oscilloscope so it triggers on the wattmeter pulse or on the chopper synch output signal. For low optical power levels, we suggest synching the oscilloscope to the chopper for optimum performance.
-
Measure the baseline to peak voltage generated by the wattmeter.
-
Determine the wattmeter sensitivity (V/W) of the detector from the calibration certificate.
-
Calculate the optical power using the following equation:
Power = (Vpeak-Vbaseline) / Calibration sensitivity
Ex:
– Vpeak-Vbaseline = 200 mV
– Detector calibration sensitivity (20 000 Volts / Watt)
Power = 200 mV / 2E+4 V/W = 10 µW
2.3.2 Working at other wavelengths than 633 nm with the UM9B-BL-L-D0
For measurements with a UM9B-BL-L-D0 wattmeter at wavelengths other than 633
nm, a correction factor must be set to compensate for the change in
sensitivity of the wattmeter caused by the change in absorption of the optical
absorber at different wavelengths.
To correct for the change in absorption refer to the spectral curve of the “
Personal Wavelength Correction TM “ certificate supplied for the wattmeter and
calculate the Multiplier by taking the percentage difference between the
absorption @ 633 nm and that at the desired wavelength.
The UM9B-BL-L-D0 does not come with a “Personal Wavelength CorrectionTM ”
certificate because of the flatness of the absorption curve. To use the
detector at another wavelength than 633 nm, please use the typical Multiplier
shown in this figure.
Figure 2.3: Typical wavelength correction
DAMAGE TO THE OPTICAL ABSORBER MATERIALS
At any time, the beam’s incident area should not be less than 10% of the
detector’s aperture. Please check with Gentec-EO to make measurements with
such small beams.
Damage is usually caused by exceeding the manufacturer’s specified maximum
tolerances:
- Average Power Density
- Peak Power Density
- Single Pulse Energy Density
Refer to the UM-B Series wattmeter specifications pages. Damage can also be
caused when using a detector with a contaminated absorber or attenuator
surface.
The damage thresholds specified in the specifications section refer to a
visible alteration of the absorber surface. In practice, a slight alteration
will not affect the wattmeter’s response. Consider the wattmeter to be damaged
and/or out of calibration when large-scale damage is evident or you can see
the metal electrode beneath the coating4
.In the case of a TEM00 (Gaussian) beam, the maximum peak power, and energy
density can be calculated using the following equation:
Density (power or energy)
Where I0 is the total beam power or energy
W is the beam radius at
NOTE: The beam waist for a TEM00 beam is the radius of a circle centered
on the beam axis and containing 86 % of the beam energy. Ref.: SIEGMAN, A.E.,
An Introduction to Lasers and Masers, p. 313 (Mcgraw-Hill Series in the
Fundamentals of Electronic Science).
Example of energy density calculation;
I0 = 1 joule (total energy)
W = 1 cm
Energy density = = 0.64 joule/cm²
Example of power density calculation;
I0 = 1 MegaWatt (total power)
W = 1 cm
Power density = = 0.64 MW/cm²
Contact Gentec-EO for evaluation, repair, recalibration, or replacement (refer
to the WARRANTY instructions).
OPTIONAL ACCESSORIES
4.1 Other Accessories:
Contact Gentec-EO for a complete list of accessories, their specifications,
and features.
Partial list:
- APM(D) Part #201848 (required to power and connect the UM9B-BL-L-DO or UM9B-BL-D0 to an oscilloscope or Lock-In Amplifier).
- MAESTRO, U-LINK, or M-LINK for use with UM9B-BL-D0
- SDC-500 Optical Chopper (required for both UM9B probes)
- Carrying Case
- Interchangeable IR windows
APPENDIX A
5.1 Recycling and separation procedure for WEEE directive 2002/96/EC.
This section is used by the recycling center when the detector reaches its end
of life. Breaking the calibration seal or opening the detector will void the
detector warranty.
The complete detector contains
1 detector with wires or DB-15
1 calibration certificate
1 Personal Wavelength Correction (UM9B-BL-D0 model only)
5.2 Separation:
Paper: certificates
Wires: detector cable
Printed circuit board: inside the detector and DB-15, no need to separate
(less than 10 cm² )
Aluminum: detector casing
DECLARATION OF CONFORMITY
Application of Council Directive(s): 2004/108/EC EMC Directive
Manufacturer’s Name: Gentec Electro Optics, Inc.
Manufacturer’s Address: 445 St-Jean Baptiste, suite 160 (Québec), Canada
G2E 5N7
Representative’s Name: Laser Component S.A.S
Representative’s Address: 45 bis Route des Gardes 92190 Meudon (France)
Type of Equipment: Laser Power/Energy Meter
Model No.: UM
Year of test & manufacture: 2011
Standard(s) to which Conformity is declared: EN 61326-1: 2006 Emission
generic standard
| Standard | Description | Performance Criteria |
|---|---|---|
| CISPR 11:2009 +A1 2010 | **Industrial, scientific and medical equipment – |
Radiofrequency disturbance characteristics – Limits and methods of
measurement| Class A
EN 61000-4-2:2009| Electromagnetic compatibility (EMC) – Part 4-2:
Testing and measurement techniques- Electrostatic| Class B
EN 61000-4-3:2006 +A2:2010| Electromagnetic compatibility (EMC) – Part
4-3:
Testing and measurement techniques- Radiated,
Radio Frequency, electromagnetic field immunity| Class A**
I, the undersigned, hereby declare that the equipment specified above
conforms to the above Directive(s) and Standard(s)
Place: Québec (Québec)
Date: June 11, 2012
UKCA DECLARATION OF CONFORMITY
Application of Council Directive(s): 2004/108/EC EMC Directive
Manufacturer’s Name: Gentec Electro Optics, Inc.
Manufacturer’s Address: 445 St-Jean Baptiste, suite 160 (Québec), Canada
G2E 5N7
Representative’s Name: Laser Component S.A.S
Representative’s Address: 45 bis Route des Gardes 92190 Meudon (France)
Type of Equipment: Laser Power/Energy Meter
Model No.: UM
Year of test & manufacture: 2011
Standard(s) to which Conformity is declared: EN 61326-1: 2006 Emission
generic standard
| Standard | Description | Performance Criteria |
|---|---|---|
| CISPR 11:2009 +A1 2010 | **Industrial, scientific and medical equipment – |
Radiofrequency disturbance characteristics –Limits and methods of
measurement| Class A
EN 61000-4-2:2009| Electromagnetic compatibility (EMC) – Part 4-2:
Testing and measurement techniques- Electrostatic| Class B
EN 61000-4-3:2006 +A2:2010| Electromagnetic compatibility (EMC) – Part
4-3: Testing and measurement techniques- Radiated, Radio Frequency,
electromagnetic field immunity| Class C**
I, the undersigned, hereby declare that the equipment specified above
conforms to the above Directive(s) and Standard(s)
Place: Québec (Québec)
Date: December 02, 2021
WWW.GENTEC-EO.COM
LEADER IN LASER BEAM MEASUREMENT SINCE 1972
| |
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POWER & ENERGY METERS| BEAM PROFILING| THZ MEASUREMENT
CANADA
445 St-Jean-Baptiste, Suite 160 Quebec, QC, G2E 5N7 CANADA
T 418-651-8003 F
418-651-1174
info@gentec-eo.com| UNITED STATES
5825 Jean Road Center Lake Oswego. OR, 97035 USA
T 503-697-1870 F
503-697-0633
info@gentec-eo.com| JAPAN
Office No. 101, EXL111 building, Takinogawa, Kita-ku, Tokyo 114-0023, JAPAN T
+81-3-5972-1290 F +81-3-5972-1291
info@gentec-eo.com|
CALIBRATION CENTERS
• 445 St-Jean-Baptiste, Suite 160
Quebec, QC, G2E 5N7 CANADA
• Werner von Siemens Str. 15
82140 Olching, GERMANY
• Office No. 101, EXL111 building, Takinogawa, Kita-Ku, Tokyo 114-0023, JAPAN
---|---|---|---
References
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