CoSF-D-RS-ER-M Low RIN Single Frequency Fiber Laser Module

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. Thanks to RIN suppression technology, CoSF-D-RS-ER-M's relaxation oscillation peak intensity noise is reduced by more than 30dB.

CoSF-D-RS-ER-M is based on erbium-doped fiber with ultra-narrow linewidth (<1kHz) and very low phase noise and frequency noise. The standard wavelength is 1550.12nm, and the optional wavelength range is 1530-1570nm, such as the standard wavelength under the ITU framework. Other wavelengths can be customized according to requirements.

Specifications:

Parameter	Unit	Specification
Parameter	Unit	Min	Typ.	Max
Part no.		CoSF-D-RS-ER-M
Center wavelength	nm	1530-1572nm fixed, other specify
Output power	mW	10	50	100
Laser output		CW, Single frequency & Single longitudinal mode
Beam quality	M²	-	1.05	1.1
Linewidth	kHz	-	-	1
RIN peak frequency	kHz	200	300	400
RIN peak	dBc/Hz	-135	-130	-120
RIN @10MHz	dBc/Hz	-150	-145	-
Phase noise (1m OPD)	urad/√Hz	70@100Hz
	urad/√Hz	7@10kHz
	urad/√Hz	0.7@100kHz
SMSR (50pm resolution)	dB	50	55	-
Output polarization		Linear
Polarization extinction ratio (PER)	dB	23	25	-
Output power stability	%	-	-	±1
Output isolation	dB	50	-	-
Wavelength thermal tuning	nm	-	0.8	1.0
PZT wavelength modulation		Optional
Modulation frequency (linear)	kHz	DC	10	20
Modulation wavelength range	GHz	-	>8	>10
Operating temperature	℃	0	-	60
Storage temperature	℃	-40	-	85
Power supply	V_DC	12
Communication interface		RS485
Output fiber type		Panda PM1550
Output fiber length	m	> 0.5
Optical connector		FC/APC
Dimension	mm	145x100x25
Weight	kg	<0.5

Ordering Information:

CoSF-D-RS-ER-M-<15xx>-<PW>-PMF/SMF-PZT-FA

PW: Output power, 20mW is fixed, 50mW and 100mW output power are adjustable

Options: 1. SMF output 2. Monitoring output 3. PZT fast modulation

Features:

· Ultra-narrow linewidth <1kHz

· Very low phase noise and frequency noise

· Very low relative intensity noise (RIN)

· Stable single frequency, single polarization output

· No mode-hopping

· Small sized package 145x100x25mm

· High reliability

Applications:

· Distributed optical fiber sensing

· Coherent LiDAR

· Fiber optic hydrophone

· Laser spectroscopy

· Coherent communication

· Gas absorption measurement

· Cold atomic physics

· Other scientific research

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