Coherent Specialty CO2 Laser Tunable Laser

Specialty CO2Waveguide Laser

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

GEM Select 50

The GEM Select 50 AdvantageThe GEM Select 50 Specialty laser brings field-proven technology to the laboratory or field application. Developed over years of testing under severe operating conditions, anddesigned to be operator-friendly, the GEM Select 50 offers high beam quality and stabilityto meet the most demanding requirements.

The clean layout of the lasers 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 outputpower per unit volume, obtained with the parallel resonant, distributed inductance excitation scheme integrated into all GEM lasers. The optional PZT tuning mirror enablesfine frequency control about line center.

The GEM Select 50 is engineered, as are all our laser products, to deliver years of reliableservice.

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 micronregion, with the strongest lines delivering over 40 watts. The optional PZT cavity-tuningmirror makes the GEM Select 50 an ideal source for CW heterodyne laser radars.

FEATURES

Tunable or Fixed Wavelength

Full-Range 9 m Operation

PZT Cavity Tuning

Variable Output Power

Autonomous Frequency/Amplitude Control

External Modulation Input

Internal Pointer

GEM Select 50GEM Select 50 Specialty Laser Options

Various options can be added to thebaseline Coherent GEM Select 50Specialty laser to fill a wide range ofapplications. If you require assistance in selecting options, provide us withyour requirements and we will workwith you to set the specifications anddesign.

Tunable WavelengthThis option allows wavelength tuning from 9.2 to 10.8 microns.A high-resolution grating and a calibrated, manually-driven differentialmicrometer permit accurate selectionof individual rotational lines. Outputpower with this option is specified as>40W at the strongest line; typical representative output powers can befound in the table.

Fixed WavelengthThis option is recommended whenfixed wavelength operation is required(specify wavelength when ordering,factory set). Output power is depen-dent on rotational line selected, withstrongest lines producing greater than40 watts. (See table for typical power.)

Full-Range 9 m OperationThis option optimizes performance in the 9P rotational branch (9.4 to 9.8 m) and allows operation over theentire wavelength range from 9.2 to10.8 m.

PZT Cavity TuningThe PZT cavity-tuning option allowsfine frequency control within any givenrotational line by adjustment of thecavity length. The typical tuning rangeis 50 MHz about the center line. Usersupplies 0 to 10V signal to adjust thecavity length.

Variable Output PowerThe variable output option allowsadjustment of output power from itsmaximum value to under 50% of fullpower. The actual adjustment range is dependent on the operating wave-length. Input power is also reduced.

Autonomous Frequency/Amplitude ControlThis option allows the laser to operatewith ultra-stable frequency and ampli-tude output. The use of an integratedmicroprocessor servo-loop system provides automatic control of thelasers output frequency and amplitudeby applying a ~1 MHz peak-to-peakdither to the cavity PZT, in conjunctionwith phase-sensitive-detection forfeedback control.

External Modulation InputThis option allows the user to operatethe laser in pulse or enhanced pulsemode via an external TTL input afterthe initial 5-second start-up delay. (Thisoption cannot be used in conjunctionwith the Variable Power Option.)

Internal PointerThis option provides an internal, visibleaiming beam that is collinear with thelasers output beam.

Specialty CO2 Waveguide Laser

Representative output power for various transitions from 9.2 to 10.8 m for the GEM Select 50 with the tunable wavelength option

0.0

10.0

20.0

30.0

40.0

50.0

60.0

9.000 9.200 9.400 9.600 9.800 10.000 10.200 10.400 10.600 10.800 11.000

Wavelength (microns)

Pow

er (w

atts

)

R 001 - 020 P R 00 0 P10R Branch 9R Branch

10P Branch 9P Branch

Rotational Wavelength PowerLine (m) (W)10R6 10.349 22.910R8 10.334 35.110R10 10.318 41.910R12 10.303 46.010R14 10.289 48.910R16 10.274 49.710R18 10.260 50.810R20 10.247 49.910R22 10.233 49.410R24 10.220 47.910R26 10.207 46.910R28 10.195 44.810R30 10.182 42.810R32 10.170 40.210R34 10.159 35.910R36 10.147 32.210R38 10.136 23.910R40 10.125 16.410R42 10.115 9.9

Rotational Wavelength PowerLine (m) (W)9R6 9.354 9.29R8 9.342 31.49R10 9.329 36.89R12 9.317 41.49R14 9.305 43.59R16 9.294 44.89R18 9.282 44.59R20 9.271 43.49R22 9.261 43.79R24 9.250 43.39R26 9.240 41.09R28 9.230 42.09R30 9.220 40.99R32 9.210 38.69R34 9.200 36.69R36 9.190 30.19R38 9.183 24.69R40 9.174 20.2

Rotational Wavelength PowerLine (m) (W)10P6 10.458 17.110P8 10.476 31.610P10 10.494 40.110P12 10.513 42.010P14 10.532 44.710P16 10.551 48.110P18 10.571 49.110P20 10.591 49.210P22 10.611 50.110P24 10.632 49.210P26 10.653 44.010P28 10.675 42.210P30 10.696 38.310P32 10.719 32.810P34 10.741 30.010P36 10.764 28.310P38 10.787 22.410P40 10.811 18.210P42 10.835 12.7

Rotational Wavelength PowerLine (m) (W)9P6 9.443 6.99P8 9.458 22.69P10 9.473 36.19P12 9.488 38.99P14 9.504 43.09P16 9.520 44.19P18 9.536 45.09P20 9.552 47.39P22 9.569 49.29P24 9.586 46.49P26 9.604 44.29P28 9.621 43.69P30 9.639 40.99P32 9.657 37.79P34 9.676 35.59P36 9.695 34.89P38 9.714 32.09P40 9.733 28.79P42 9.753 24.49P44 9.773 23.2

Specialty CO2 Waveguide Laser

Coherent, Inc. guarantees that the output power of the GEM Select 50 will exceed therated 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 ofdelivery that the GEM Select 50 is free from defects in material and workmanship. Thewarranty does not apply to any unit damaged by accident, abuse or operation in a mannerinconsistent with the procedures and specifications outlined in the manual suppliedwith the laser.

GEM Select 50

Printed in the U.S.A. MC-134-02-2.5M0104REV2Copyright 2004 Coherent, Inc.

C O H E R E N T, I N C .5100 Patrick Henry DriveSanta Clara, CA 95054phone (800) 527-3786

(408) 764-4983fax (800) 362-1170

(408) 988-6838e-mail tech.sales@Coherent.comweb www.Coherent.com

Japan +81 (3) 5635 8700Benelux +31 (30) 280 6060France +33 (1) 6985 5145Germany +49 (6071) 9680Italy +39 (02) 34 530 214UK +44 (1353) 658 833

INVISIBLE LASER RADIATION.AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION.

CLASS IV LASER RADIATION PRODUCTPER EN60825-1 (1994)

CO2 LASER 9.0 - 11.0 MICRONS50 WATT CW

Laser Head

196.85 mm(7.75 in.) R 3.175 mm

(0.125 in.)790.575 mm (31.125 in.)

635 mm (25.0 in.)

121.92 mm(4.8 in.)

127 mm (5.0 in.)

15.875 mm(0.625 in.)

7.137 mm(0.281 in.)

103.886 mm(4.09 in.)

60.477 mm(2.381 in.)

GEM Select 50

Output Power (W) 50Wavelength (m) 10.6 nominalMode Quality TEM00Polarization Fixed LinearBeam Diameter (mm, 1/e2) 1.7 0.2Beam Divergence (mrad) 8.3 0.6Power Stability 3%

Electrical 200-240 VAC, 50-60 Hz,