Yingnan Peng

Diode-pumped Kerr-lens mode-locked Yb:LYSO laser with 61fs pulse duration

A stable diode pumped Kerr-lens mode-locked (KLM) Yb:LuYSiO5 (Yb:LYSO) laser of generating 61 fs pulses at a central wavelength of 1055.4 nm is experimentally demonstrated. This is, to the best of our knowledge, the first demonstration of femtosecond KLM operation in Yb:LYSO laser, and it is believed that 61 fs is the shortest pulse duration ever produced from an Yb-doped orthosilicate laser. The average output power of the mode-locked laser is 40 mW and the repetition rate is 113 MHz.

CEO stabilized frequency comb from a 1-μm Kerr-lens mode-locked bulk Yb:CYA laser.

We report the first Kerr-lens mode-locked (KLM) bulk frequency comb in the 1-μm spectral regime. The fundamental KLM Yb:CYA laser is pumped by a low-noise, high-bright 976-nm fiber laser and typically provides 250-mW output power and 57-fs pulse duration. Only 58-mW output pulses were launched into a 1.3-m photonic crystal fiber (PCF) for one octave-spanning supercontinuum generation. Using a simplified collinear f-2f interferometer, the free-running carrier-envelope offset (CEO) frequency was measured to be 42-dB signal-to-noise ratio (SNR) for a 100-kHz resolution and 9.6-kHz full width at half maximum (FWHM) under a 100-Hz resolution. A long-term CEO control at 23 MHz was ultimately realized by feeding the phase error signal to the pump power of the oscillator. The integrated phase noise (IPN) of the locked CEO was measured to be 316 mrad with an integrated range from 1 Hz to 10 MHz. The standard deviation and Allan deviation for more than 4-hour recording are 1.6 mHz and 5.6 × 10(-18) (for 1-s gate time), respectively. This is, to the best of our knowledge, the best stability achieved among the 1-μm solid-state frequency combs.

Diode-pumped high-power Kerr-lens mode-locked Yb:CYA laser

We report on a diode-pumped Kerr-lens mode-locked Yb:CYA laser. Average power as high as 1.5 W was obtained with pulse duration of 68 fs at central wavelength of 1040nm.

Fiber laser pumped femtosecond Yb:GSO laser

We realized a SESAM mode-locked Yb:GSO laser pumped by a fiber laser. 182-fs pulses centered at 1034 nm was generated at a repetition rate of 100.6 MHz. The average output power is 480 mW.

Diode-pumped all-solid-state Ytterbium-based ultrafast lasers

We present the recent development of diode-pumped all-solid-state ultrafast lasers based on novel ytterbium-doped laser materials. 33-fs pulses were obtained from a Yb:CYA oscillator. Power scaling and pulse compression was discussed.

Generation of 15W femtosecond laser pulse from a Kerr-lens mode-locked Yb:YAG thin-disk oscillator*

We demonstrated a robust power-scalable Kerr-lens mode-locked (KLM) operation based on a Yb:YAG thin-disk oscillator. 15-W, 272-fs pulses were realized at a repetition rate of 86.7 MHz with an additional Kerr medium and a 2.5 mm hard aperture in the cavity. 247-fs pulses with an average power of 11 W could also be obtained by using a 2.4 mm hard aperture. Based on this shorter pulse, high efficient second-harmonic generation (SHG) was performed with a 1.7-mm-long LiB3O5 (LBO) crystal. The SHG laser power was up to 5 W with the power fluctuation RMS of 1% measured over one hour.

A 12.1-W SESAM mode-locked Yb:YAG thin disk laser*

Pumped by a 940 nm fiber-coupled diode laser, a passively mode-locked Yb:YAG thin disk oscillator was demonstrated with a semiconductor saturable absorber mirror (SESAM). 12.1 W mode-locked pulses were obtained with pulse duration of 698 fs at the repetition rate of 57.43 MHz. Measurement showed that the beam quality was close to the diffraction limit.

High power dual-wavelength Kerr-lens mode-locked Yb:YAG thin disk laser

We demonstrated a dual-wavelength Kerr-lens mode-locked Yb:YAG thin disk laser centered at the wavelengths of 1031 nm and 1049 nm, respectively. Total average output power was 12.9 W with typical pulse duration of 220 fs.