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CoLIS-HP Series 1550nm Long Pulse Single Frequency PM Fiber Laser

Time：2019.01.11 Source: Author：

Connet CoLIS-HP series 1550nm nanosecond long pulse single-frequency polarization-maintaining fiber laser is a modularized pulsed fiber laser specially designed for long-distance coherent Doppler wind lidar application. This fiber laser is for long-pulse applications (100ns-2us) based on eye-safe operating wavelength. The output laser is the single-mode linear polarization with the output single-pulse energy up to 150uJ.
CoLIS-HP series 1550nm nanosecond long pulse single-frequency polarization-maintaining fiber laser internally integrates with Connet’s proprietary single-frequency narrow linewidth seed laser source with the linewidth narrow to 5kHz. The extinction ratio can be up to 100dB or more through the cascaded acousto-optic modulator (AOM) to produce a pulse signal with high turn-off ratio.
Connet CoLIS-HP series 1550nm nanosecond long pulse single-frequency polarization-maintaining fiber laser adopts all PM fiber design and can achieve the high polarization extinction ratio (PER) output. The output end can be integrated with high power three-port optical circulator according to the application requirements.

Features:

• Eye-safe Wavelent: 1550nm
• Single Pulse Energy: up to 150uJ
• Adjustable Repetition Rate: 5-20kHz
• Pulse Width: 100-2000ns
• Single-mode Output
• High PER

Applications:

• Coherent Doppler Wind LiDAR
• Environmental Monitoring
• Pollution Monitoring
• Other Scientific Research

Main Test Data:

Parameter		Unit	Test Result
Pulsed Fiber Laser Module
Operating Wavelength		nm	1549.780
Local Oscillator Output Power (Tap End)		mW	4.3
Pulse Output Power	@200ns/10kHz	uW	22
	@300ns/10kHz		35
	@400ns/10kHz		50
	@1000ns/5kHz		70
Linewidth		kHz	<10
SMSR		dB	47
Relative Intensity Noise (RIN) @1MHz		dBc/Hz	<-130
Phase Noise	@10Hz	µrad/√Hz/m	<400
	@100Hz		<300
	@1kHz		<30
	@10kHz		<3
Beam Quality		M²	<1.05
Output Power Stability		%	<2
Polarization Extinction Ratio (PER)		dB	>20
Input/output Isolation		dB	>30
Pulse Extinction Ratio		dB	>100
Pulse Width (Full Pulse Width)		ns	200~1000
Repetition Rate		kHz	5~10
Frequency Shift		MHz	+80
RF Signal Input	Impedance		High Impedance
	High Level	v	3.3~5
	Low Level	v	0
Output Fiber Type			PM1550-XP
Output Fiber Connector			FC/APC
Output Fiber Length		m	1
Output Spectrum (TAP End)			See Fig. 2
Ouput Pulse Waveform	@200ns/10kHz		See Fig. 3
	@300ns/10kHz		See Fig. 4
	@400ns/10kHz		See Fig. 5
	@1000ns/5kHz		See Fig. 6
Pulsed Fiber Amplifier Module
Output Average Power @200ns/10kHz @Pump Power 11500mW	@25℃	W	1.1
	@-40℃		1.2
	@60℃		1.05
Output Average Power @300ns/10kHz @Pump Power 14500mW	@25℃	W	1.5
	@-40℃		1.55
	@60℃		1.44
Output Average Power @400ns/10kHz @Pump Power 17000mW	@25℃	W	1.8
	@-40℃		1.85
	@60℃		1.6
Output Average Power @1000ns/5kHz @Pump Power 13000mW	@25℃	W	1.3
	@-40℃		1.35
	@60℃		1.25
Measured Single Pulse Energy @25℃	@200ns/10kHz	uJ	100
	@300ns/10kHz		140
	@400ns/10kHz		162
	@1000ns/5kHz		223
Beam Quanlity		M²	<1.3
Output Power Stability		%	<5
Polarization Extinction Ratio (PER)		dB	>18
Input/3-port Circulator Fiber Type			PM1550-XP
Input/3-port Circulator Fiber Connector			FC/APC
Input/3-port Circulator Fiber Length		m	1
Output Fiber Type			PLMA-GDF-25/300
Output Fiber Connector			FC/APC
Output Fiber Length		m	0.35
Input Isolation		dB	>30
Output Isolation		dB	>20
Output Pulse Waveform	@200ns		See Fig. 7
	@300ns		See Fig. 8
	@400ns		See Fig. 9
	@1000ns		See Fig. 10
Output Spectrum	@200ns		See Fig. 11
	@300ns		See Fig. 12
	@400ns		See Fig. 13
	@1000ns		See Fig. 14

Notes:

The test results of the output power were measured with the fiber connector.
Since there are two overlaying AOMs inside the pulsed laser, the pulse width set on the function generator is different from the actually measured pulse width. The test is based on the measured full pulse width. Here list some tested typical values for reference: setting 244ns corresponds to the full pulse width of 200 ns; setting 340 ns corresponds to the full pulse width of 300 ns; setting 440 ns correspond to the full pulse width of 400 ns; setting 1040 ns, corresponds to the full pulse width of 1000 ns.

Product Information and Main Test Equipment:

Product	1550nm Long Pulse Single Frequency PM Fiber Laser (For Long-distance Wind Measurement)
P/N	CoLIS-1550-M-SF-HP
S/N	201805086
Main Test Equipment	Power Meter (OPHIR, NOVA II)
	Energy Meter (OPHIR, PE9-C)
	OSA (YOKOGAWA, AQ6375)
	Oscilloscope (KEYSIGHT, DSOS104A, 1G)
	1G Detector (THORLABS, DET08CFC/M)
	Function Generator (RIGOL, DG5101)

Test Environment and Power Supply:

Parameter		Specification
Power Supply		12-24V_DC
Communication Interface		RS232
Operating Temperature	Pulsed Fiber Laser	0⁰C ~ +50⁰C
	Pulsed Fiber Amplifier	-40⁰C ~ +60⁰C
Ambient Temperature		<90%
Test Temperature	Pulsed Fiber Laser	0⁰C ~ +50⁰C
	Pulsed Fiber Amplifier	-40⁰C ~ +60⁰C
Ambient Humidity		<90%

Schematic Diagram of Test:

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

▲ Fig. 2: Output Spectrum of Laser @TAP End

▲ Fig. 3: Ouptut Pulse Waveform of Laser @200ns/10kHz

▲ Fig. 4: Ouptut Pulse Waveform of Laser @300ns ▲ Fig. 5: Ouptut Pulse Waveform of Laser @400ns

▲Fig. 6: Ouptut Pulse Waveform of Laser @1000ns ▲Fig. 7: Ouptut Pulse Waveform of Amplifier @200ns

▲ Fig. 8: Ouptut Pulse Waveform of Amplifier @300ns ▲Fig. 9: Ouptut Pulse Waveform of Amplifier @400ns

▲ Fig. 10: Ouptut Pulse Waveform of Amplifier @1000ns ▲ Fig. 11: Output Spectrum of Amplifier @200ns

▲ Fig. 12: Output Spectrum of Amplifier @300ns ▲ Fig. 13: Output Spectrum of Amplifier @400ns

▲ Fig. 14：Output Spectrum of Amplifier @1000ns

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