Gigahertz combs stabilized
Milestone results for gigahertz comb stabilization
Our approach is based on diode-pumped solid-state or semiconductor disk lasers (i.e. not Ti:sapphire or fiber lasers) combined with external supercontinuum generation. The goal is to keep the overall system compact and simple, i.e. if possible without external pulse compression and/or pulse amplification.
OFC: Optical Frequency Comb
CEO: Carrier Envelope Offset (see definition here)
2021
Cascaded quadratic nonlinearities (CQN) from phase-mismatched second-harmonic generation build the foundation for robust soliton modelocking in straight-cavity laser configurations by providing a tunable and self-defocusing nonlinearity. We find good agreement with the measured dependence of fCEO on laser output power, showing a broad fCEO tuning capability from zero up to the pulse repetition rate.
Our results provide the basis for developing the next generation of versatile, high repetition rate, and low-noise optical frequency combs from modelocked lasers based on CQN.
[486] L. M. Krüger, S. L. Camenzind, C. R. Phillips, U. Keller
Download"Carrier-envelope offset frequency dynamics of a 10-GHz modelocked laser based on cascaded quadratic nonlinearities" (PDF, 3 MB)
Optics Express, vol. 29, No. 22, pp. 36915-36925, 2021
2020
First CEO frequency detection of 10.5-GHz linear-straight-cavity Yb:CALGO solid-state laser with improved laser from 2017, without external amplification and/or pulse compression using a SiN waveguide for supercontinuum generation. Download[Ref. 468] (PDF, 5.1 MB)
2018
First tighly locked optical frequency comb from a semiconductor disk laser. This time without external amplification or pulse compression which results in much better noise performance. Download[Ref. 453] (PDF, 1.9 MB)
2017
First CEO frequency stabilization of a gigahertz semiconductor disk laser, however still with external amplification and pulse compression Download[Ref. 428] (PDF, 1.6 MB)
Q-switching problem resolved for gighertz diode-pumped solid-state laser First 10-GHz Yb:CALGO laser generating 166 fs, 1.2 W in a linear straight cavity Download[Ref. 427] (PDF, 784 KB)
Physics background for femtosecond modelocking based on adiabatic excitation of quadratic solitons Download[Ref. 392] (PDF, 1.9 MB)
First full stabilization and characterization of an optical frequency comb from a diode-pumped solid-state laser with GHz repetition rate. Download[Ref. 424] (PDF, 3.9 MB)
2016
Gigahertz offset-free mid-infrared frequency comb based on optical parametric amplification in a PPLN waveguide: 1-GHz Yb:CALGO laser with SiN waveguide supercontinuum generation and an PPLN chip containing buried RPE waveguides with different poling periods for 2.4 µm to 4.2 µm OFC generation. Noise is an issue. Download[Ref. 414] (PDF, 2.2 MB)
First gigahertz frequency comb offset (i.e. CEO frequency) stabilization based on supercontinuum generation in silicon nitride waveguides
Using a 1-GHz Yb:CALGO laser supercontinuum generation in PCF and SiN waveguides are compared. Lower noise for SiN waveguides.
Also stabilization of pump wavelength for Yb:CALGO laser with a volume holographic grating (VHG) is important for low-noise operation. Download[Ref. 407] (PDF, 2.6 MB)
2015
Explained in more details: First octave-spanning coherent supercontinuum generation in a silicon nitride waveguide Download[Ref. 399] (PDF, 1.5 MB)
First CEO frequency detection using supercontinuum generation in silicon nitride (Si3N4) waveguides using both a 100-MHz and 1-GHz Yb:CALGO laser Download[Ref. 390] (PDF, 1.8 MB)
2014
CEO frequency beat signal detection from a SESAM-modelocked 1.8-GHz Yb:CALGO laser
Supercontinuum generation in highly nonlinear photonics crystal fiber (PCF) without additional pulse compression or amplification. Download[Ref. 379] (PDF, 2 MB)
Layout of Yb:CALGO laser generating 2.95 W, 59.4 fs, 1.8 GHz, 1060 nm from a z-shaped cavity. Download[Ref. 370] (PDF, 1.8 MB)
2012
CEO frequency beat signal detection from a SESAM-modelocked 1-GHz Yb:KGW laser with commercial multi-mode diode pump laser
Layout of Yb:KGW laser generating 3.4 W, 125 fs, 1.06 GHz, 1046.6 nm from a w-shaped cavity. Supercontinuum generation in highly nonlinear photonics crystal fiber (PCF) without additional pulse compression or amplification. Download[Ref. 346] (PDF, 1.8 MB)
2011
First full stabilization of an optical frequency comb generated from a femtosecond diode-pumped solid-state laser operating in the 1.5-μm spectral region Download[Ref. 320] (PDF, 1.6 MB)
CEO frequency beat signal detection from a SESAM-modelocked 1-GHz Yb:KGW laser with single-mode diode pump laser (i.e. DBR tapered diode laser): Layout of Yb:KGW laser generating 2.2 W, 290 fs, 1 GHz from a z-shaped cavity. Supercontinuum generation in highly nonlinear photonics crystal fiber (PCF) after external pulse compression to 100 fs. Download[Ref 315] (PDF, 1023 KB)
2010
First CEO frequency signal from a spectrally broadened ultrafast solid-state laser oscillator operating in the 1.5 μm spectral region (i.e. SESAM-modelocked Er:Yb:glass laser): stable supercontinuum generation can be obtained even with pulse durations >170 fs in a polarization-maintaining highly-nonlinear fiber (PM-HNLF) Download[Ref. 294] (PDF, 756 KB)