NKT Photonics Koheras BasiK, low noise, sub-kHz linewidth, single frequency fiber laser

Summary Box:

Continuous wave, true single frequency fiber lasers modules with wavelengths from 1030 to 1580nm, power from 10mW to 40mW and fully integrated piezo driver and function generator for fast wavelength modulation

Description:

Koheras BASIK Modules are narrow linewidth, ultra low noise, stable single frequency fiber laser supplied in a small, compact OEM module. Offering between 10mW and 40mW output power in the wavelength range 1535-1580nm for the X15, Based on a truly single mode DFB fiber laser architecture, they offer ultra stable performance free of mode-hops. The Koheras BASIK is available for operation at different wavelength ranges and with different characteristics on linewidth, and phase and intensity noise as follows: E15/X15 - is an Erbium doped fiber laser system for operation in the 1530-1585 nm wavelength range offering the lowest phase and frequency noise and narrowest linewidth of the entire laser portfolio. C15 - is a co-doped Erbium/Ytterbium fiber laser system for operation in the 1530-1585 nm wavelength range offering the lowest intensity noise (RIN) and is shut noise limited. Y10 - is an Ytterbium doped fiber laser. Any interferometric use that requires high frequency stability or a long coherence length will benefit from this type of laser technology. The typical applications include seismic sensing such as oil and gas exploration and exploitation, security (perimeter and pipeline detection), and structural pipeline monitoring. Furthermore, the low intensity noise of the lasers combined with the high spectral stability make them ideal as sources for wind LIDAR systems used for the wind turbine and aerospace industry, as well as for interferometry laser vibrometry sensing systems.

• Up to 40mW, in the wavelength range 1030-1121nm and 1535-1585nm
• <1 kHz linewidth
• 10GHz, fast wavelength modulation range, low frequency and intensity noise
• Long term thermal wavelength stability 0.1pm
• No need for external piezo driver, BASIK has integrated piezo driver and function generator
• Compact and robust
• Longitudinal single mode, single frequency

Specifications:

Model	X15	E15	C15	Y10
Laser emission	CW - inherently single frequency
Beam quality [M²]	< 1.05	< 1.05	< 1.05	< 1.05
Linewidth [kHz] *	< 0.1	< 0.1	< 15	< 20
Max phase noise   [dB(Rad/√Hz/m]	-110@1 Hz -125@10 Hz -130@100 Hz -128@1 kHz	-90@10 Hz -110@100 Hz -130@20 kHz	-69@10 Hz -89@100 Hz -109@20 kHz	-
Max phase-noise [µrad/√Hz/m]	3.1 @1 Hz 0.6@10 Hz 0.3@100 Hz 0.4@1 kHz	32@10 Hz 3.2@100 Hz 0.3@20 kHz	355@10 Hz 36@100 Hz 3.5@20 kHz	-
RIN peak [MHz]	app. 0.7	app. 0.7	app. 1	app. 1.5
RIN level @ peak / 10 MHz [dBc/Hz]	<-100 / <-135		<-120 /<-140	<-105 /<-140
Optical S/N (50 pm res.) [dB]	> 50 (typ. > 55)	> 50 (typ. > 55)	> 65 (typ > 70)
Min thermal wavelength tuning range [pm] *	+/- 125	+/- 350	+/- 350	+/- 240
Total thermal tuning range [pm]	350	1000	1000	680
Options:
Fast wavelength modulation range [GHz]	0.6	8	8	10
Fast wavelength modulation [kHz]	Up to 20
PM output - PER [dB]	> 23
Monitor optical	FC/APC

Downloads:

NKT Koheras BasiK datasheet