642nm Laser Diode, Photop Model FRPM-642-20

The FRPM-642-20 is a mini size laser pointer with high reliability, stability, and polarization extinction ratio. It has a wavelength range of 635nm to 645nm and an output power of 18mW to 25mW. This laser pointer is ideal for laser displays, test and measurement sources, and survey equipment.

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Typical Specifications:

Optical Parameters:
- Wavelength: 635nm to 645nm
- Output Power: 18mW to 25mW
- Power Stability: +/-0.5% to +/-2.5%
- Operating Temperature: -10°C to +40°C
- M-Square: 1.1
- Polarization Extinction Ratio: 13dB to 15dB
- Fiber Coupling Efficiency: 40% to 55%

Electrical Parameters:
- LD Working Current: 122mA to 155mA
- LD Working Voltage: 2.5V to 2.7V
- Laser Operating Mode: APC

Fiber Parameters:
- Fiber Type: 4.5/125μm PM Fiber
- Fiber Numerical Aperture: 0.13

Mechanical Parameters:
- Laser Head Dimensions: Length 28.35mm, Diameter 8mm

Reliability:
- Operating Humidity: 5% to 85% R.H
- Storage Temperature: -40°C to +85°C
- Shock: 150m/s2, 6ms, semisinusoidal, 4000 shocks, z-axis; 75m/s2, 6ms, semisinusoidal, 1000 shocks, x,y-axis
- Vibration: Amplitude = ±0.75mm, 10 Hz to 57 Hz sinusoidal, 20 cycles per axis; Acceleration 1g, 57 to 500 Hz sinusoidal, Sweep Rate 1 Oct/min
- Expected Lifetime (MTTF): 10000hrs at room temperature