Products Events

Home > News > Products Events > CoSF Series 1.0um Co...

CoSF Series 1.0um CoSF-D Narrow Linewidth Single Frequency Fiber Laser Basic Module

Time:2019.12.30    Source:      Author:

Connet CoSF-D narrow linewidth single frequency fiber laser is a low-noise fiber laser independently developed by patented technology. It adopts the Distributed Feedback Bragg Grating (DFB) type fiber laser technology and has independent intellectual property to achieve stable linear polarization, single longitudinal mode and ultra-narrow linewidth single-frequency laser output. The unique Relative Intensity Noise (RIN) suppression technique guarantees the low noise operation of the CoSF-D narrow linewidth single frequency fiber laser.

Connet CoSF-D narrow linewidth single frequency fiber laser has excellent performance with the output optical spectrum linewidth of kHz level and the ultra-low frequency noise and intensity noise. The basic module of the CoSF-D narrow linewidth single frequency fiber laser is compact and robust with strong environmental interference capability. The output power can be up to 20mW or higher.

The center wavelength of 1.0um CoSF-D narrow linewidth single frequency fiber laser basic module can be freely selected in the range of 1015nm to 1110nm. The typical center wavelengths are 1018nm, 1030nm, 1053nm, 1064nm and 1083nm, etc.



• Ultra-narrow Linewidth
• Stable Single-frequency, Single-polarization Operation                    

• No Mode Hopping, No Burst Noise

• Low Phase Noise, Low Relative Intensity Noise

• Flexible Design, Wavelengths optional

• Linear Polarization Output, High PER

• Compact and Robust



• Seed Laser for High Power Fiber Laser System

• LiDAR 

• Cold Atomic Physics
• Laser Spectroscopy               
• Space Laser Communication

• Other Scientific Research 


Main Test Data:


Test Result

Output Power 1


Center Wavelength




Storage Temperature

-40~ +85

Output Fiber Type


Output Fiber Connector


Output Fiber Length



The output power is measured with the fiber connector.


Product Information and Main Test Equipment:



1.0um CoSF-D Narrow Linewidth Single Frequency Fiber Laser Module



Main Test Equipment

Optical Spectrum Analyzer (Anritsu MS9710)

Power Meter (OPHIR NOVAII 3A)


Test Environment and Power Supply:




Power Supply

12VAC, 3A

Test Temperature

+15~ +30

Operation Temperature

-20~ +60



Warming-up Time



Schematic Diagram of Test:

Fig. 1 Schematic Diagram of Simultaneous Measurement for Spectrum and Pulse Waveform

Fig. 2 Schematic Diagram of Linewidth Measurement

Fig. 3 Measured Spectrum (SMSR60dB)

Fig. 4 Narrow linewidth of <5kHz can be achieved with low noise, good beat frequency stability and wavelength stability, and strong anti-interference ability.