K2-1000

Ideal tool for dual-comb spectroscopy and ranging.

1 GHz single-cavity dual-comb laser

Two spatially separated pulse trains with >2 W per beam
<100 fs pulse duration
Sub-cycle relative timing jitter
Ultra-low relative intensity noise
Fundamental Gaussian beam mode output
Tunable and long-term stable repetition rate difference
Compact system design

DESCRIPTION

The system produces a pair of modelocked femtosecond lasers (optical frequency combs) with a slightly different pulse repetition rate. In the time domain, the optical delay is rapidly swept through a range of 1 nanosecond at very high speeds. In the frequency domain, beat notes between each pair of optical comb lines are generated via heterodyne detection. Due to the gigahertz repetition rate, high power per comb line is obtained.

Through a novel shared-cavity architecture, our system is able to achieve ultra-low noise simply in free-running operation. In particular, the laser pair is passively stable with highly correlated intensity, timing, and phase noise properties between the two combs. Since there is only one laser cavity and no high-speed locking electronics or optical amplification, most of the complexity of conventional dual-comb and ASOPS systems is removed, while providing a small footprint and superior performance.

OPTIONS

Second harmonic generation
Wavelength conversion via optical parametric oscillator
Passive air or water cooling
Low power and fiber coupled configurations
Vibration and acoustic noise isolation
Optical isolation
Other repetition rates (please inquire)

APPLICATIONS

VIEW TECHNICAL SPECIFICATIONS

We strive to excel in performance. Specifications can change – please inquire for the latest model. Laser specifications

Power per comb	>2.0 W
Pulse duration	<100 fs, clean sech² pulses
Repetition rate	1 GHz
Pulse energy	>2 nJ
Center wavelength	1050±10 nm
Beam quality factor M²	<1.1
Beam ellipticity	<10 %
Individual comb RIN	<-160 dBc/Hz for frequencies >1 MHz

Dual comb specifications

Repetition rate difference	tunable between 0 – 200 kHz
Relative timing noise	<10 fs [1 kHz, 100 kHz]

SHG option

Center wavelength	525±5 nm
Power per comb	>100 mW

Available outputs

Optical	Two spatially separated pulse trains
Cross-correlation signal	Trigger signal at the repetition rate difference
Digital signals	Δf_rep/f_rep value with better than 10^-6 precision

Controls

Repetition rate difference	Active Δf_rep/f_rep stabilization at Δf_rep rate up to 25 kHz, above free-running
Repetition rate	Fixed (digital or analog on request)
Power	Power allocation between fundamental and SHG (SHG option only)

Physical dimensions

Laser head (L x W x H)	494 x 291 x 179 mm³
Beam output height	75 mm on (W) side
K2-Link Control Unit (L x W x H)	395 x 436 x 88.05 mm³(2U 19″ rack unit)
Cabling	3 m between control box and laser head

Requirements

Operating temperature	15 -30 ºC
Relative humidity	<70% (non-condensing)
Electrical requirements	100-120 VAC, 3 A, 50-60 Hz / 200-240 VAC, 1.5 A, 50-60 Hz
Rated power	300 W