ThorLabs SFL1550S

ThorLabs SFL1550S: Single-Frequency Laser

The ThorLabs SFL1550S is a single-frequency laser diode that operates at a center wavelength of 1550 nm. It is part of ThorLabs’ External Cavity (ECL) Single-Frequency Laser Diodes series, designed to deliver a narrow linewidth and single-frequency output.

Key Specifications:

• Center Wavelength: 1549.5 nm to 1550.5 nm
• Linewidth: 50 kHz typical, 100 kHz maximum
• Side Mode Suppression Ratio (SMSR): 40 dB typical, 45 dB maximum
• Optical Power: 25 mW to 40 mW
• Forward Voltage: 1.5 V typical, 1.8 V maximum
• Operating Current: 300 mA typical
• Threshold Current: 50 mA typical
• Slope Efficiency: 0.2 mW/mA typical
• Relative Intensity Noise (RIN): -150 dB/Hz typical

Features:

• Narrow Linewidth: Suitable for applications requiring precise wavelength control.
• Single-Frequency Output: Ensures consistent performance without mode hopping.
• Integrated TEC Element: Allows for temperature control to stabilize the laser output.
• FC/APC Terminated: Compatible with standard fiber optic connectors.

Applications:

• Telecommunications: Ideal for applications requiring stable, single-frequency laser sources.
• Spectroscopy: Suitable for near-infrared spectroscopy (NIRS) and other applications requiring precise wavelength control.
• LIDAR: Can be used in LIDAR systems requiring high precision and stability.

References:

1. ThorLabs: Pigtailed External Cavity (ECL) Single-Frequency Lasers, Butterfly Package - https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=4934
2. ThorLabs: Pigtailed External Cavity (ECL) Single-Frequency Lasers, Butterfly Package (PDF) - https://www.thorlabschina.cn/catalogpages/obsolete/2017/SFL1620P.pdf
3. ThorLabs: Pigtailed, Distributed Feedback (DFB) Single-Frequency Lasers with Integrated Optical Isolator - https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=7928
4. ThorLabs: Pigtailed Distributed Feedback (DFB) Single-Frequency Lasers - https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=15266