CKSF-D Narrow Linewidth Single Frequency Fiber Laser for Laser Spectroscopy

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

Techwin 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. Please refer to CKSF-D-RS series products.

CKSF-D narrow linewidth single frequency fiber laser module has a small size, a sturdy package, strong resistance to environmental interference, output power is up to100mW. CKSF-D-ER-M is based on erbium-doped fiber with ultra-narrow linewidth (<1kHz) and 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.

Laser spectroscopy is a versatile diagnostic tool for analytical applications and recent advances in fiber laser technology combined with selective and sensitive spectroscopic detection techniques have led to the development of new diagnostic tools for trace gas and isotope analysis. Optical gas analyzers provide high time resolution, high accuracy and precision, and can overcome limitations of more conventional instrumentation (such as mass spectrometry) relating to robustness, portability, cost of acquisition and ownership, and commercial availability. Thereby they enable new laboratory and field applications in industry and research that in the past were difficult or impossible to carry out. Progress in this field is still rapid, resulting in improved instrument capabilities and an ever-widening range of applications. Most instruments in the field are based upon spectral detection and, therefore, issues dealing with selectivity, sensitivity and stability play a key role in understanding the overall system performance. In atmospheric measurement applications selectivity is important, because the target gases are usually embedded in a mixture of background gases, which might interfere with the measurement. High resolution laser spectroscopy of the strong fundamental bands in the mid-infrared spectral region has proven to be well suited for highly selective measurements at reduced pressure. 

Features:

l   Ultra-narrow linewidth <1kHz

l   Very low phase noise and frequency noise

l   Low relative intensity noise (RIN)

l   Stable single frequency, single polarization output

l   No mode-hopping

l   Small sized package 145x100x25mm

l   High reliability

Applications:

l   Distributed optical fiber sensing

l   Coherent LiDAR

l   Fiber optic hydrophone

l   Laser spectroscopy

l   Coherent communication

l   Gas absorption measurement

l   Cold atomic physics

l   Other scientific research

Specifications:

 

Parameter	Unit	Specification
		Min	Typ.	Max
Part no.		CKSF-D-ER-M
Center wavelength	nm	1530-1572nm fixed, other specify
Output power	mW	5	-	100
Laser output		CW, Single frequency & Single longitudinal mode
Beam quality	M2	-	1.05	1.1
Linewidth	kHz	-	-	1
RIN peak frequency	kHz	300	400	500
RIN peak	dBc/Hz	-	-105	-
RIN @10MHz	dBc/Hz	-	-140	-
Phase noise (1m OPD)	urad/√Hz	70@100Hz
	urad/√Hz	7@10kHz
	urad/√Hz	0.7@100kHz
SMSR (50pm resolution)	dB	60	>70	-
Output polarization		Linear
Polarization extinction ratio (PER)	dB	20	23	-
Output power stability	%	-	0.5	1
Output isolation	dB	50	-	-
Wavelength thermal tuning	nm	0.6	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	VDC	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: CKSF-D-ER-M-<15xx>-<PW>-PMF/SMF-PZT-FA  PW: Output power, 5- 20mW is fixed, 50mW and 100mW output power are adjustable Options:  1. SMF output 2. Monitoring output 3. PZT fast modulation