Tunable Laser. PZT Cavity Tuning

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1 Coherent Specialty CO 2 Laser Tunable Laser GEM Select 100 Specialty CO 2 Waveguide Laser The GEM Select 100 Advantage The GEM Select 100 Specialty laser brings fieldproven technology for both laboratory and field applications. Developed over years of testing under severe operating conditions, and designed to be operator-friendly, the GEM Select 100 offers high beam quality and stability to meet the most demanding requirements. The clean layout of the laser s rear panel offers immediate access to the interlock control, the keyoperated on-off switch, and status indicators. The superior performance of the GEM product line is demonstrated in high output power per unit volume, which is obtained with the parallel, resonant, distributed inductance excitation scheme integrated into all GEM lasers. The optional PZT tuning mirror enables fine frequency control about line center. The GEM Select 100 is engineered, as are all our laser products, to deliver years of reliable service. Additional features provide flexibility for your unique requirements. For instance, the low noise spectral density of the GEM Select 100 makes it an ideal choice for atom trapping. Various options can be added to the base unit COHERENT-DEOS GEM Select 100 Specialty laser to fill a wide range of applications. If you require assistance in selecting options, provide us with your requirements and we will work with you to establish the specifications and design. PZT Cavity Tuning The PZT cavity-tuning option allows fine frequency control within any given rotational line by adjustment of the cavity length. The typical tuning range is ±30 MHz from the center line. User supplies 0 to 10V signal to adjust the cavity length. Variable Output Power The Variable Output Option allows adjustment of output power from its maximum value to under 50% of full power. The actual adjustment range is dependent on the operating wavelength. This adjustment also reduces the input power. External Modulation Input This option allows the user to operate the laser in pulse or enhanced pulse mode via an external TTL input after the initial 5-second start-up delay (This option cannot be used in conjunction with the Variable Power Option). Internal Pointer This option provides an internal, visible aiming beam that is co-linear with the laser s output beam. FEATURES Compact Size and Lightweight Outstanding Beam Quality and Stability Permanently Sealed-off Operation; No Gas Consumption Rugged, Field-Proven Design All-Metal Seals for Long Life Fixed Linear Polarization OPTIONS PZT Cavity Tuning Variable Output Power External Modulation Input Internal Pointer

2 GEM Select 100 Laser Head Side View Specialty CO 2 Waveguide Laser Front View cm ( in.) Output Beam cm (6.717 in.) cm (7.736 in.) cm (4.798 in.) Back View cm (2.372 in.) Bottom View GEM Select 100 Output Output Power (W) 100 Wavelength (µm) 10.6 nominal Mode Quality TEM 00 Polarization Fixed Linear Beam Diameter (mm, 1/e 2 ) 3.8 ±0.4 Beam Divergence (mrad) <5 Power Stability (%) ±2 are subject to change without notice. Protected under U.S. patents: , , Licensed by PATLEX Corp. under U.S. patent 4,704,583. Input Electrical VAC, Hz, <14A Cooling Water + 25% Dow Frost 2.0 GPM / 20 C ±5 C Other cooling and power options are available. Contact your nearest Coherent sales representative. Physical Weight (lbs) 52 (Laser Head) Physical Dimensions (in) L x 7.75W x 6.75H COHERENT, INC Patrick Henry Drive Santa Clara,CA Phone: Fax: tech.sales@coherentinc.com Web: LOCAL OFFICES Japan +81 (3) Benelux +31 (30) France +33 (1) Germany +49 (6071) 9680 Italy +39 (02) UK +44 (1353) Coherent,Inc. guarantees that the output power of the GEM Select 100 will exceed the rated power for a period of one year,independent of the actual operating time. Coherent,Inc. also warrants to the original purchaser for a period of one year from the date of delivery that the GEM Select 100 is free from defects in material and workmanship. The warranty does not apply to any unit damaged by accident,abuse or operation in a manner inconsistent with the procedures and specifications outlined in the manual supplied with the laser. The GEM Select 100 is a laser component that does not include all safety features as required by the Center for Devices and Radiological Health (CDRH). It is sold solely to qualified manufacturers who in their end product will supply all interlocks and indicators,and will comply fully with CDRH regulations and/or local regulatory agencies. INVISIBLE LASER RADIATION. AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION. Printed in the U.S.A. MC M0503 Copyright 2003 Coherent,Inc. CO2 LASER MICRONS 50 WATT CW CLASS IV LASER PRODUCT

3 Coherent Specialty CO 2 Laser Tunable Laser GEM Select 50 Specialty CO2 Waveguide Laser The GEM Select 50 Advantage The GEM Select 50 Specialty laser brings field-proven technology to the laboratory or field application. Developed over years of testing under severe operating conditions, and designed to be operator-friendly, the GEM Select 50 offers high beam quality and stability to meet the most demanding requirements. The clean layout of the laser s rear panel offers immediate access to the interlock control, the key-operated on-off switch, and status indicators. The superior performance of the GEM product line is demonstrated in high output power per unit volume, obtained with the parallel resonant, distributed inductance excitation scheme integrated into all GEM lasers. The optional PZT tuning mirror enables fine frequency control about line center. The GEM Select 50 is engineered, as are all our laser products, to deliver years of reliable service. Additional features provide flexibility for your unique requirements. With the optional grating tuner, over 60 discrete rotational lines are attainable over the 9.2 to 10.8 micron region, with the strongest lines delivering over 40 watts. The optional PZT cavity-tuning mirror makes the GEM Select 50 an ideal source for CW heterodyne laser radars. FEATURES Compact Size and Lightweight Outstanding Beam Quality and Stability Permanently Sealed-Off Operation; No Gas Consumption Rugged, Field-Proven Design All-Metal Seals for Long Life Fixed Linear Polarization Wavelength Tuning Option Available

4 GEM Select 50 GEM Select 50 Specialty Laser Options FEATURES Tunable or Fixed Wavelength Full-Range 9 µm Operation PZT Cavity Tuning Variable Output Power Autonomous Frequency/ Amplitude Control External Modulation Input Internal Pointer Various options can be added to the baseline Coherent GEM Select 50 Specialty laser to fill a wide range of applications. If you require assistance in selecting options, provide us with your requirements and we will work with you to set the specifications and design. Tunable Wavelength This option allows wavelength tuning from 9.2 to 10.8 microns. A high-resolution grating and a calibrated, manually-driven differential micrometer permit accurate selection of individual rotational lines. Output power with this option is specified as >40W at the strongest line; typical representative output powers can be found in the table. Fixed Wavelength This option is recommended when fixed wavelength operation is required (specify wavelength when ordering, factory set). Output power is dependent on rotational line selected, with strongest lines producing greater than 40 watts. (See table for typical power.) Full-Range 9 µm Operation This option optimizes performance in the 9P rotational branch (9.4 to 9.8 µm) and allows operation over the entire wavelength range from 9.2 to 10.8 µm. PZT Cavity Tuning The PZT cavity-tuning option allows fine frequency control within any given rotational line by adjustment of the cavity length. The typical tuning range is ±50 MHz about the center line. User supplies 0 to 10V signal to adjust the cavity length. Variable Output Power The variable output option allows adjustment of output power from its maximum value to under 50% of full power. The actual adjustment range is dependent on the operating wavelength. Input power is also reduced. Autonomous Frequency/ Amplitude Control This option allows the laser to operate with ultra-stable frequency and amplitude output. The use of an integrated microprocessor servo-loop system provides automatic control of the laser s output frequency and amplitude by applying a ~1 MHz peak-to-peak dither to the cavity PZT, in conjunction with phase-sensitive-detection for feedback control. External Modulation Input This option allows the user to operate the laser in pulse or enhanced pulse mode via an external TTL input after the initial 5-second start-up delay. (This option cannot be used in conjunction with the Variable Power Option.) Internal Pointer This option provides an internal, visible aiming beam that is collinear with the laser s output beam.

5 Specialty CO2 Waveguide Laser Representative output power for various transitions from 9.2 to 10.8 µm for the GEM Select 50 with the tunable wavelength option 10R Branch 10R R R R R R R R R R R R R R R R R R R R Branch 9R R R R R R R R R R R R R R R R R R Power (watts) 60.0 R P R 00 0 P Wavelength (microns) 10P Branch 10P P P P P P P P P P P P P P P P P P P P Branch 9P P P P P P P P P P P P P P P P P P P P

6 GEM Select 50 Specialty CO2 Waveguide Laser Laser Head mm (7.75 in.) R mm (0.125 in.) mm ( in.) mm (4.8 in.) mm (4.09 in.) 635 mm (25.0 in.) 127 mm (5.0 in.) mm (2.381 in.) Ø mm (0.281 in.) mm (0.625 in.) GEM Select 50 Output Input Output Power (W) 50 Wavelength (µm) 10.6 nominal Mode Quality TEM 00 Polarization Fixed Linear Beam Diameter (mm, 1/e 2 ) 1.7 ±0.2 Beam Divergence (mrad) 8.3 ±0.6 Power Stability ±3% are subject to change without notice. Protected under U.S. patents: , , Licensed by PATLEX Corp. under U.S. Patent 4,704,583. Electrical VAC, Hz, <8A Cooling Water + 25% Dow Frost* Coolant 1.5 GPM / 20 C ±5 C Other cooling and power options are available. Contact your nearest Coherent sales representative. * Dow Frost is a trademark of the Dow Chemical Company. Physical Weight (laser head) Physical Dimensions (LxWxH) kg (40 lbs.) x x mm ( x 7.75 x in.) COHERENT, INC Patrick Henry Drive Santa Clara, CA phone (800) (408) fax (800) (408) tech.sales@coherent.com web Japan +81 (3) Benelux +31 (30) France +33 (0) Germany +49 (6071) 9680 Italy +39 (02) UK +44 (1353) Coherent, Inc. guarantees that the output power of the GEM Select 50 will exceed the rated power for a period of one year, independent of the actual operating time. Coherent, Inc. also warrants to the original purchaser for a period of one year from the date of delivery that the GEM Select 50 is free from defects in material and workmanship. The warranty does not apply to any unit damaged by accident, abuse or operation in a manner inconsistent with the procedures and specifications outlined in the manual supplied with the laser. INVISIBLE LASER RADIATION. AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION. CLASS IV LASER RADIATION PRODUCT PER EN (1994) Printed in the U.S.A. MC M0505Rev.B Copyright 2005 Coherent, Inc. CO 2 LASER MICRONS 50 WATT CW