DIAMOND-C-20 COHERENT | Alldatasheet
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Low Power CO² OEM Lasers for Marking and Engraving Applications Diamond C-20 & C-20+ Series CO₂ Lasers FEATURES APPLICATIONS
- Superior beam quality and power stability
- Low maintenance air-cooled design with rugged reliability
- Flexible, extremely compact and easy to install
- Economical, high quality laser processing on a wide range of materials
- Optimized performance at multiple wavelengths (9.3 µm, 10.2 µm, or 10.6 µm)
- Marking
- Engraving The Coherent C-20 CO² laser provides 20 Watts of power with best-in-class reliability and package size, making it the OEM laser of choice for cost-effective and compact laser marking and coding systems. This production-ready, easy-to-integrate air-cooled laser enables high quality laser marking and coding with low maintenance and operating costs. The C-20 is ideal for laser processing of many materials, including paper, plastics, wood, rubber, leather, cloth and more. The C-20 is part of the Coherent C-Series family of products which offer a full range of power levels – from 20 W to 70 W. Based on a sealed waveguide and integrated RF power supply design, the C-20 boasts outstanding production-proven reliability (lifetime >50,000 hours), while delivering superior beam quality and power stability in a compact, economical and flexible package. The modular platform design provides cost-effective optimization of operating wavelength (from 9.3 to 10.6 μm), enabling rapid adaptability to changing applications and market needs.
Diamond C-20 & C-20+ Series Specifications Diamond C-20 (9.3 μm) Diamond C-20 (10.2 μm) Diamond C-20 Optical Output Power1 (W) 13 20 20 Power Stability2 (%) ±10 Mode Quality (M²) <1.2 Beam Diameter (mm) 1.8 ±0.2 Beam Divergence (mrad, full angle) 7.5 ±0.5 Polarization >100 to 1 (fixed linear, parallel to width) Operating Frequency and Duty Cycle 0 to 200 kHz, 0 to 100% DC Ingress Protection Rating (IP) NA Configuration and Facility Requirements Weight 6.8 kg (15.0 lbs.) Dimensions (L x W x H) 395 x 93 x 155 mm (15.5 x 3.7 x 6.1 in.) Input Power3 48 VDC, 11.5 A Cooling Liquid Available upon Request Heat Dissipation (W) <575 Maximum Case Temperature <60°C (140°F) Operating Environment Temperature Altitude Humidity 5 to 40°C (41 to 104°F) <2000 m (6500 ft.) Non-condensing Shipping/Storage Environment -10 to 60°C (14 to 140°F), non-condensing Notes: 1. Power measured at 25°C and derated by 1%/C for higher laser head temperatures. 2. Power stability based on ±(Pmax - Pmin)/(2*Pmax) average power measurement at constant duty cycle after 10-minute warm-up at operating condition. 3. Optional fans add 1 A.
Diamond C-20 & C-20+ Series Specifications Diamond C-20+ (9.3 μm) Diamond C-20+ (10.2 μm) Diamond C-20+ Optical Output Power1 (W) 13 20 20 Power Stability2 (%) ±8 Mode Quality (M²) <1.2 Beam Diameter (mm) 1.8 ±0.2 Beam Divergence (mrad, full angle) 7.5 ±0.5 Polarization >100 to 1 (fixed linear, parallel to width) Operating Frequency and Duty Cycle 0 to 200 kHz, 0 to 100% DC Ingress Protection Rating (IP) IP 65 Configuration and Facility Requirements Weight 6.8 kg (15.0 lbs.) Dimensions (L x W x H) 475 x 93 x 155 mm (18.7 x 3.7 x 6.1 in.) Input Power3 48 VDC, 11.5 A Cooling Liquid Available upon Request Heat Dissipation (W) <575 Maximum Case Temperature <60°C (140°F) Operating Environment Temperature Altitude Humidity 5 to 45°C (41 to 113°F) <2000 m (6500 ft.) Non-condensing Shipping/Storage Environment -10 to 60°C (14 to 140°F), non-condensing Notes: 1. Power measured at 25°C and derated by 1%/C for higher laser head temperatures. 2. Power stability based on ±(Pmax - Pmin)/(2*Pmax) average power measurement at constant duty cycle after 10-minute warm-up at operating condition. 3. Optional fans add 1 A.
Diamond C-20 & C-20+ Series Mechanical Specifications Diamond C-20A Laser Head 83.7 mm (3.3 in.) 92.5 mm (3.6 in.) 40.6 mm (1.6 in.) 7.9 mm (0.3 in.) 14.2 mm (0.6 in.) 64 mm (2.5 in.) 30.5 mm (1.2 in.) 12.5 mm (0.5 in.) 12.5 mm (0.5 in.) 83.3 mm (3.3 in.) 71.2 mm (2.8 in.) 8.2 mm (0.3 in.) 20 mm (0.8 in.) 40 mm (1.6 in.) 357 mm (14.1 in.) 312 mm (12.3 in.) 296 mm (11.7 in.) Beam Output Beam Output 152.7 mm (6.0 in.) 154.5 mm (6.1 in.) Cooling Air In Cooling Air Out Cooling Air Out 27.18 ±0.51 mm (1.07 ±0.02 in.) 19.56 ±0.51 mm (0.77 ±0.02 in.) 10X M4 11.4 mm (0.5 in.) Both Sides 4X M4 15.2 mm (0.6 in.) DC Power Connector Control Connector, RJ45 Rear View Front View Side View Top View Bottom View
Diamond C-20 & C-20+ Series Mechanical Specifications Diamond C-20+ Air-Cooled Laser Head 40.0 mm (1.57 in.) 40.6 mm (1.60 in.) 11.7 mm (0.46 in.) 83.7 mm (3.30 in.) 8.0 mm (0.31 in.) 20.0 mm (0.79 in.) 83.3 mm (3.28 in.) 139.6 mm (5.50 in.) 92.5 mm (3.64 in.) 27.2 mm (1.07 in.) 13.0 mm (0.51 in.) 64.0 mm (2.52 in.) 76.0 mm (2.99 in.) 19.6 mm (0.77 in.)
48 VDC
296.0 mm (11.65 in.) 325.9 mm (12.83 in.) 357.0 mm (14.06 in.) 10X ØM4X0.7-6H 11.4 mm (0.45 in.) Both Sides 4X ØM4X0.7-6H 15.2 mm (0.60 in.) Cooling Air Out Cooling Air In Beam Output 30.5 mm (1.20 in.) Control Cable RJ45
48 VDC Power
(2) 14 GA Wires 398.6 mm (15.69 in.) 372.1 mm (14.65 in.) 40.0 mm (1.57 in.) 8.0 mm (0.31 in.) 20.0 mm (0.79 in.) 83.3 mm (3.28 in.) 113.4 mm (4.46 in.) (1.20 in.) 92.5 mm (3.64 in.) 27.2 mm (1.07 in.) 13.0 mm (0.51 in.) 64.0 mm (2.52 in.) 49.7 mm (1.96 in.) Beam Output 19.6 mm (0.77 in.) Control Cable RJ45 (2) 14 GA Wires 398.6 mm (15.69 in.) 372.1 mm (14.65 in.) 326.5 mm (12.85 in.) 324.3 mm (12.77 in.) 357.0 mm (14.06 in.) 10X ØM4X0.7-6H 11.4 mm (0.45 in.) Both Sides 4X ØM4X0.7-6H 15.2 mm (0.60 in.) Diamond C-20A+ Air-Cooled with Fans Laser Head Top View Top View Side View Front View Front View Side View Rear View Rear View
Diamond C-20 & C-20+ Series © 2025 Coherent Corp. Legal notices : coherent.com/legal For more information www.coherent.com Mechanical Specifications Diamond C-20+ Liquid-Cooled Laser Head 40.6 mm (1.60 in.) 40.0 mm (1.57 in.) 8.0 mm (0.31 in.) 20.0 mm (0.79 in.) 102.6 mm (4.04 in.) (1.20 in.) 92.5 mm (3.64 in.) 27.2 mm (1.07 in.) 13.0 mm (0.51 in.) 64.0 mm (2.52 in.) 29.2 mm (1.15 in.) Beam Output 19.6 mm (0.77 in.) 11.7 mm (0.46 in.) Control Cable RJ45 (2) 14 GA Wires 398.6 mm (15.69 in.) 372.1 mm (14.65 in.) 326.5 mm (12.85 in.) 306.8 mm (12.08 in.) 357.0 mm (14.06 in.) 91.4 mm (3.60 in.) 10X ØM4X0.7-6H 11.4 mm (0.45 in.) Both Sides 4X ØM4X0.7-6H 15.2 mm (0.60 in.) Front View Rear View Side View Top View VISIBLE AND INVISIBLE LASER RADI AT I ON. AV OID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADI AT I ON. CLASS IV LASER RADI AT I ON PRODUCT PER EN60825-1 (1994) CO 2 LASER 9.2 - 10.8 MICRONS