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We report on the first demonstration of the locking of a 28000 finesse cavity in picosecond regime. Besides, we have unambiguously measured the CEP drift of 2 ps pulses and characterized its effect on cavity locking.
We report an observation of soliton rains in normal dispersion Yb fiber laser. The cavity consisted of a narrow filter and a broad birefringent plate filter. Soliton rain was obtained in the weak mode-locking regime.
Theory of thermally induced polarization and phase beam distortions in laser ceramics was improved and extended to the case of class 23 and m3 cubic crystals.
Various bound states consisting of up to five solitons have been stably generated from a passively mode-locked fiber laser for the first time, using a carbon nanotube modelocker through intracavity gain/loss tuning.
The concept of a "dissipative soliton" provides an excellent framework for understanding complex mode-locked laser pulse dynamics from a unified picture. It has stimulated innovative laser cavity designs in the past few years. This tutorial lecture provides conceptual pictures illustrated with universal dynamics, highlights recent achievements and prospects for mode-locked laser development.
We present a first realization of effective multi-dimensional laser mode-combs (hyper-combs), constructed by multi-frequency active mode-locking, mapped to the multi-dimensional spherical-model in statistical-mechanics (and provide its rare physical realization) with implications to ultrashort light-pulse generation.
Measurements of the free running carrier envelope offset frequency (fceo) linewidth of a similariton based optical frequency comb show that the frequency noise of the laser is independent of net cavity dispersion.
A previously unreported correlation is presented between reduced values of unsaturated absorption at the laser gain peak and low measured time-bandwidth-product (TBP) values of optical pulses emitted from monolithic quantum dot passively mode-locked lasers.
A novel stabilization scheme for passively mode-locked lasers is demonstrated. By electrical absorber-modulation via the time-delayed laser output, a significant broadband reduction of phase noise is achieved. A comparison with all-optical feedback stabilization is given.
We explore experimentally a new regime of operation for mode locking in a Ti:Sapphire laser with enhanced Kerr nonlinearity, where the threshold for pulsed operation is lowered below the threshold for continuous-wave operation.
We have generated 16.5-MHz, 400-fs pulses with a power of 490 W in a thin-disk ring oscillator under development for intra-cavity high-order harmonic generation.
110 MHz high repetition rate soliton mode-locked fiber laser with 40 mW high average power was demonstrated using carbon nanotube polyimide film. Super continuum at 1.7 um was generated and ultrahigh resolution OCT was demonstrated.
The measured dynamics of split-pulsing in a mode-locked quantum dot laser have been studied using a numerical model. This is important to understand the origin of such parasitic dynamical effects, and to minimize their occurrence in practical devices.
We report a novel semiconductor passively mode-locked edge-emitting laser based on a multi-quantum-well structure, emitting at 766 nm and enabling the generation of a stable 19.4-GHz pulse train with a pulse duration of ∼5 ps.
We demonstrate an Er:fiber ring laser operated at the fundamental repetition rate of 325 MHz. Two gain fibers with opposite dispersion were combined both for compactness and intra-cavity dispersion compensation.
We demonstrate a 1.2-GHz repetition rate, diode-pumped carbon nanotube (CNT)-mode-locked Yb:KYW laser with 168 fs pulse duration. To our knowledge, this corresponds to the highest repetition rate from CNT-mode-locked femtosecond bulk solid-state lasers.
This paper summarizes our recent progress in 2 micron fiber lasers using Tm and Tm-Ho-co-doped multi-component glass fibers. Single frequency fiber lasers with linewidth less than 3kHz, Q-switched single frequency fiber lasers with kilowatt peak power, and mode-locked fiber lasers near 2 micron wavelength were demonstrated using these newly developed fibers.
A 100 MHz mode-locked laser is tuned unevenly over 325 kHz with a stepper motor to produce high-SNR spectroscopic measurements of HCN with a 3 GHz spectral resolution. A setup to reduce the resulting heterodyne bandwidth is also demonstrated.
We demonstrate 10-GHz microwave signal generation from a free-running mode-locked Er-fiber laser with 3.7 fs (2.6 fs) absolute rms timing jitter integrated from 1 kHz (10 kHz) to 100 MHz offset frequency.
Spectrally efficient dual-comb detection is utilized for self-referenced measurements of spectral phase of three distinct semiconductor frequency combs. The higher-order phase is quantified for each, elucidating the dispersive properties of the gain and fiberized cavities.
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