CoSF-D Mini Narrow Linewidth Single Frequency Fiber Laser

Connet Laser Technology Co., Ltd.

2020-07-13

Connet CoSF-D is a low-noise Single Frequency Fiber Laser based on Distributed Feedback Bragg Grating (DFB) technology. It has independent intellectual property rights and achieves a stable single-frequency laser output with single longitudinal mode, linear polarization, and narrow linewidth.

CoSF-D has very low phase and frequency noise and low relative intensity noise (RIN). Connet uses unique packaging technology to ensure low-noise DFB single frequency fiber lasers with excellent wavelength stability.

Connet uses extra-cavity technology to significantly suppress the relative intensity noise (RIN) of the DFB single frequency fiber laser, ensuring that the resonant cavity of the single frequency fiber laser is not disturbed.

CoSF-D Mini Narrow Linewidth Single Frequency Fiber Laser has a small compact size of 110x70x25mm with the sturdy package and output power of up to 20mW.

CoSF-D-ER-Mini is based on erbium-doped fiber with ultra-low phase noise and ultra-narrow linewidth (<1kHz). CoSF-D-EY-Mini is based on Erbium & Ytterbium co-doped fiber with quite low relative intensity noise (RIN) and narrow linewidth (<10kHz). The standard wavelength is 1550nm, and the optional wavelength range is 1530-1572nm, such as the standard wavelength under the ITU framework. Other wavelengths can be customized according to requirements.

Features:

Ultra-narrow linewidth <10kHz, <1kHz
Stable single frequency, single polarization output
No mode-hopping, no burst noise
Low phase noise and frequency noise
Low relative intensity noise (RIN)
High reliability
Small compact package: 110x70x25mm

Applications:

Distributed optical fiber sensing
Coherent LiDAR
Fiber optic hydrophone
Laser spectroscopy
Coherent communication
Gas absorption measurement
Cold atomic physics
Other scientific research

Test Data:

Parameter	Test Result
Center wavelength	1549.73nm
Output power	20mW
Linewidth	8kHz
SMSR	55.46dB
Beam quality	<1.05
RIN peak frequency	~1300kHz
RIN peak	~ -133dBc/Hz
RIN@10MHz	<-140dBc/Hz
PER	>25dB
Output isolation	>32dB
Output power stability (RMS)	<1%
Operating temperature	0-50℃
Storage temperature	-20-65℃
Optical spectrum	Fig. 1
Beat frequency spectrum	Fig. 2
RIN	Fig. 3
Phase noise	Fig. 4

Product Information:

Product	CoSF-D Mini Narrow Linewidth Single Frequency Fiber Laser
P/N	CoSF-D-RS-EY-Mini
Operation mode	CW, Single Frequency, Single Longitudinal Mode
Output fiber	1m PM1550-XP, 0.9mm jacket, FC/APC connector
Monitor fiber	Optional
Dimension	110x70x25mm
Control interface	RS485

Test Environment and Power Supply:

Parameter	Specification
Power Supply	+12VDC, 1A
Test Temperature	25℃
Humidity	<90%
Warming-up Time	<mins

Schematic Diagram of Test:

Schematic Diagram of Spectrum Measurement

Schematic Diagram of Linewidth Measurement

Fig. 1 Optical Spectrum

Fig. 2 Beat Frequency Spectrum

Fig. 3 RIN

Fig. 4 Phase Noise

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