The QPhotonics QFLD-635-1SAX is a 635nm Fabry-Perot laser diode delivering 1mW of output power in continuous wave or pulsed operation. This single-mode fiber-coupled device combines fast 0.5ns rise time with integrated photodiode monitoring, making it suitable for precision optical applications requiring stable red-wavelength emission. Operating across 0°C to +75°C, the laser maintains wavelength stability with a 0.1nm/°C temperature coefficient.
Technical Specifications
• Wavelength: 635nm (typical)
• Output Power: 1mW
• Laser Type: Fabry-Perot single-mode
• Operation Mode: Continuous wave (CW) or pulsed
• Rise Time: 0.5ns
• Spectral Width (FWHM): 1nm or 0.56nm
• Wavelength Temperature Coefficient: 0.1nm/°C or 0.2nm/°C
• Operating Temperature Range: 0°C to +75°C
• Threshold Current: 36mA
• Operating Current: 52mA
• Operating Voltage: 2.21V
• Monitor Photodiode Current: 0.08mA
– Key Features
• Built-in monitor photodiode for real-time power monitoring
• Single-mode fiber coupling (FiberCore SM600)
• Fiber numerical aperture: 0.1–0.14
• Mode field diameter: 4.3μm at 633nm, 4.6μm at 680nm
• Sub-nanosecond switching capability for dynamic applications
• Coaxial package configuration
– Compatibility & Integration
Fiber-pigtailed output compatible with FC/PC or FC/APC connectors when specified as options. Lead soldering temperature rated to 260°C for integration into populated assemblies.
