arroyo instruments 224B Series Tec To-Can LaserMount User Manual

arroyo instruments 224B Series Tec To-Can LaserMount

224B TEC TO-Can LaserMount

Thank you for choosing the 224B TEC TO-Can LaserMount from Arroyo Instruments. The 224B LaserMount is designed for high performance and long-term use.

Product Features

• Support for 30mm CAGE systems, even with the cover off.
• Support for 1 lens tube systems when used with optional 224-C-02 cover.
• Designed to be quickly integrated with Arroyo’s LaserSource and TECSource instruments.
• Industry-standard D-sub connectors and pin-outs allow for quick integration into existing laser applications.
• Banana plug for case ground, which can be used as a wrist strap connection or to assure proper grounding to an optical table or test bench.

Optional Covers

The 224B LaserMount has two optional covers:

• Standard Cover Plate (p/n 224-C-01): This plate comes standard with the 224B. It has a single 0.27 (6.86mm) opening for laser beam exit, and has mounting holes for 30mm cage systems.
• Opto-Mech Cover Plate (p/n 224-C-02): The Opto-Mech Cover Plate has mounting holes for 30mm cage systems as well as 1 lens tube systems.
• Fiber Pigtailed Cover Plate (p/n 224-C-03): The Fiber Pigtailed Cover Plate is designed for use with fiber-pigtailed panel mount TO-can lasers.

Installation and Use

Configuring the Mount

Start by identifying the specific electrical configuration of your device from the illustrations provided in the manual, and then set the LD and PD switches to their correct positions. For example, if your device has both LD and PD anodes tied together, as shown in the upper left diagram below, switch both LD and PD switches into the down position. When installing your laser, the isolated (non-commoned) photodiode pin goes into the left hole of the laser socket, and the isolated (non-commoned) laser pin goes into the right hole of the laser socket. If the laser and photodiode of your device are completely isolated from each other, you will still need to common them together at the fixture. Choose the configuration that describes how the laser and photodiode are tied together through the COM (upper and lower) holes.

Introduction

Thank you for choosing the 224B TEC TO-Can LaserMount from Arroyo Instruments. The 224B LaserMount is designed for high performance and longterm use. The 224B LaserMount integrates a 4.7W Peltier cooler for precise control of the package temperature. With an operating range of +15°C to 85°C, the 224B LaserMount covers a wide range of case temperature control needs. In addition to the standard cover, which includes support for 30mm CAGE systems, the 224B LaserMount has two optional covers: one which adds 1” lens tube systems, and another with a larger opening designed for fiber pigtailed devices. The mount requires no wiring thanks to simple configuration switches conveniently located on the face of the fixture, and the 224B LaserMount is finned to provide the highest heat dissipation capability. Both 8-32 and M4 threaded holes are located on the bottom for post-mounting applications. The 224B LaserMount offers all the features you would expect from a modern TO-Can laser diode fixture, including

• Support for 30mm CAGE systems, even with the cover off.
• Support for 1” lens tube systems when used with optional 224-C-02 cover.
• Designed to be quickly integrated with Arroyo’s LaserSource and TECSource instruments.
• Industry-standard D-sub connectors and pin-outs allow for quick integration into existing laser applications.
• Banana plug for case ground, which can be used as a wrist strap connection or to assure proper grounding to an optical table or test bench.

Accessories – Cover Plates

The 224B LaserMount comes standard with the 224-C-01 cover plate, which has a small opening for free-space devices, and a mounting pattern for 30mm CAGE systems. However, you can purchase additional cover plates separately, making your investment in the 224B LaserMount even more valuable. These include:

• Standard Cover Plate (p/n 224-C-01) This plate comes standard with the 224B. It has a single 0.27” (6.86mm) opening for laser beam exit, and has mounting holes for
  30mm cage systems.

• Opto-Mech Cover Plate (p/n 224-C-02) The Opto-Mech Cover Plate has mounting holes for 30mm cage systems as well as 1” lens tube systems.

• Fiber Pigtailed Cover Plate (p/n 224-C-03) The Fiber Pigtailed Cover Plate is designed for use with fiber-pigtailed panel mount TO-can lasers

Photos and additional information about the cover plates is available later in this manual, or online at www.arroyoinstruments.com.

Installation and Use

Configuring the mount : Start by identifying the specific electrical configuration of your device from the illustrations below, and then set the LD and PD switches to their correct positions. For example, if your device has both LD and PD anodes tied together, as shown in the upper left diagram below, switch both LD and PD switches into the down position.

When installing your laser, the isolated (non-commoned) photodiode pin goes into the left hole of the laser socket, and the isolated (non-commoned) laser pin goes into the right hole of the laser socket. The upper and lower holes of the laser socket, labeled the COM pins, are always tied together. The PD and LD switches on either side of socket are to set the polarity of the outside pin. For example, if your device has the laser cathode common to the photodiode anode (lower left diagram above), when you plug in your device, the left hole will have the photodiode cathode, and the right hole will have the laser anode.

Therefore, the PD switch would be in the C (cathode) position, and the LD switch would be in the A (anode) position. If the laser and photodiode of your device are completely isolated from each other, you will still need to common them together at the fixture. Choose the configuration that describes how the laser and photodiode are tried together trough the COM (upper and lower) holes To ground the common (center) pin to the earth ground connection, switch the EGND switch to the Y position. To float the laser, put the EGND switch in the N position. The picture below illustrates the switches, diode socket, and two screw holes for the TO-can clamp.

Connect to Laser Diode Driver and TEC Controller: Next, connect the 224B LaserMount to your laser diode driver and temperature controller.

NOTE
Arroyo Instruments offers Laser and TEC cables designed to connect directly between our LaserSource and TECSource products. If you use your own cables, ensure the connections are properly made between the instrument and the mount, and that proper grounding techniques are used. The pin-out of the connectors can be found later in this document.

WARNING
Be sure you are properly ESD protected before handling your laser. For additional information, read the section titled “Laser Diode Protection” later in this manual.

Mounting your device : Insert the device so that the common pin is the top or bottom pin, the isolated photodiode pin is on the left, and the isolated laser pin is on the right. The illustrations below show the mounting of a free-space TO-can laser, but the fiber-pigtailed device would mount in a similar fashion

Once the device is loaded, for free-space TO-can lasers, use the provided 5.6mm or 9mm diode clamp to clamp the TO-can to the temperature-controlled plate. For fiber pigtailed lasers, the panel mount holes will line up with either the inside (for 5.6mm) or outside (for 9mm) holes. When tightening the screws, do not over tighten, which may strip the threads. Also, do not tighten one side further than the other, as poor or uneven temperature control may result. The photos below illustrate the various clamps and cover.

You may choose to install the cover. The cover is not required but will improve the temperature stability of the TO-can. The picture below shows the 224B with device loaded and cover installed on a regular 224B.

The Nitrogen fitting is intended for use with lid-less TO-can applications, or where condensation might occur. When using the standard 224B, the recommended flow rate is 1-2 SCFH. Your mount is now ready for use.

Connector Pin-Outs

Laser DB-9 Connector Pin-Out

Technical Specifications

224B TEC TO-Can LaserMount

LASER PACKAGE SUPPORTED|
Laser Package| 5.6mm and 9mm TO-Can, 3 & 4 pin
Panel Mount Packages| 12mm or 18mm hole spacing
Pin Length| 5mm to 10mm
TEMPERATURE CONTROL|
Temperature Range (°C)| +15 to +85
Sensor Type| 10kΩ Thermistor
TE Module 1| Imax = 3.1A
 | Vmax = 2.6V
STANDARD COVER (224-C-01)|
Size (H x W x D) [in(mm)]| 2.0 (50.8) x 2.0 (50.8) x 0.18 (4.57)
Mounting System(s)| 30mm CAGE, 4-40 x 4 holes
OPTO-MECH COVER (224-C-02)|
Size (H x W x D) [in(mm)]| 2.0 (50.8) x 2.0 (50.8) x 0.30 (7.62)
Mounting System(s)| 30mm CAGE, 4-40 x 4 holes and
 | 1” lens tube (1.035”-40)
FIBER PIGTAIL COVER (224-C-03)|
Size (H x W x D) [in(mm)]| 2.0 (50.8) x 2.0 (50.8) x 0.18 (4.57)
Mounting System(s)| None
INPUT CONNECTOR|
Laser Diode| DB-9, male
Mount TEC| DB-15, male
Nitrogen| 1/16” barb
GENERAL|
Grounding Plug| Banana jack
Size (H x W x D) [in(mm)]| 2.0 (50.8) x 2.0 (50.8) x 1.94 (49.3)2
Mounting holes| 8-32 threaded hole
 | M4 threaded hole

1. At 25°C
2. Depth is with no cover installed and excluding rear connectors

Mechanical Specifications

Laser Diode Protection

Electrostatic discharge and current spikes can be a significant cause of damage to laser diodes, but when proper precautions are taken, these risks can be greatly reduced or eliminated. Arroyo Instruments’ controllers offer state- of-art laser diode protection, but no instrument can fully shield the laser from damage. Please take these considerations into account when operating your laser:

1. Always set the current limit at or below the maximum current your laser can handle. This prevents the device from accidentally driving the current too high, either via the set point or from the modulation port. This also provides additional current limiting protection from ESD.
2. Always work in an ESD safe operating environment, including the use of wrist straps, ESD grounded work surfaces and floors, and ESD-safe tools.
3. Where the AC power to the laser driver to temperature controller may be noisy, use isolation transformers or uninterruptible power supplies that provide isolation.
4. Make sure all cables are securely connected and fastening screws are screwed in tight.
5. Do not route power cords or other cables in parallel with the laser or temperature controller cables, as coupling may occur between the cables and inject noise into the laser diode.
6. While it is not possible to create a ground loop through the LaserSource because of its isolation of all inputs, it is possible when using other equipment. Ensure that any other equipment is properly isolated to avoid any ground loop problems.

Warranty

Arroyo Instruments warrants this product to be free from defects in material and workmanship under normal use and service for a period of one (1) year from date of shipment. It does not apply when the product has been misused, altered or damaged by accident or abnormal conditions of operation. If found to be defective during the warranty period, the product will either be repaired or replaced at Arroyo Instruments’s option. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. ARROYO INSTRUMENTS SHALL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE PURCHASE OR USE OF ITS PRODUCTS.

Service and Support

For service and support, contact your local distributor or Arroyo Instruments.

• By mail : Arroyo Instruments 1201 Prospect Street San Luis Obispo, CA 93401 USA
• By phone : +1 805-543-1302
• By fax : +1 805-543-1303
• Email : support@arroyoinstruments.com
• Web : http://www.arroyoinstruments.com

References

• Arroyo Instruments - Laser Diodes and Temperature Controllers

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