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We demonstrate an interferometric configuration comprising a saturable Bragg reflector for phase-to-amplitude response conversion. Its static nonlinear phase response is determined and used to obtain tunable nonlinear amplitude depth modulation.
Laser dynamics of asynchronously modelocked Er-fiber soliton lasers is investigated theoretically and experimentally. The pulse parameters are found to exhibit complicated slow periodic variations and can be examined experimentally by analyzing the RF spectra.
The pulse energy fluctuation of a kilohertz femtosecond laser was reduced from 1.33% RMS to 0.28% RMS, which improves the carrier-envelope phase stability from 500 mrad to 200 mrad.
We demonstrate an actively and harmonically mode-locked laser employing a 151-cm-long bismuth-oxide-based erbium-doped fiber and a 250-cm-long bismuth-oxide-based highly nonlinear fiber. Stable 10-GHz short pulses are obtained with a 60-nm tuning range covering the CL-band.
Pulse shaping theory is extended to include rapid waveform update for line-by-line pulse shaping. The fundamental trade-off between response speed and waveform fidelity is illustrated through simulation.
A pulsewidth tunable 10 GHz flat-top pulse train is generated based on the combined action of active mode locking and nonlinear-polarization-rotation pulse shaping. The SMSR is 65 dB and the timing jitter is 145 fs.
We report the characteristics of a wavelength swept laser with a scanning fiber Fabry-Perot filter in the 1300 nm. We investigate the dependence of the scanning frequencies of the conventional and Fourier domain mode-locked (FDML) wavelength swept laser. In the FDML swept laser, the transient intensity profiles and the tuning bandwidths were investigated according to the injection currents and detuning...
We propose and demonstrate a modelocked bi-directional VECSEL with a double V cavity configuration. The laser generates 1.04 mum optical pulses with a 0.76 GHz repetition rate and a total average output power of 4 mW.
We experimentally demonstrate that the slave laser oscillating on the ground state (GS) or excited state (ES) transitions can be locked through the injection of optical pulses generated via the opposite transition bands, i.e. the ES or GS transition, respectively.
We report the shortest pulses (290 fs) obtained directly from semiconductor lasers. These were achieved using a passively mode-locked semiconductor disk laser with a graded-gap barrier design in the gain section operating near 1036 nm.
We demonstrate a record resonance frequency enhancement of 1.55-mum VCSELs from 10 GHz to 107 GHz under ultra-high optical injection locking. Detuning and injection-ratio dependence are characterized to show the broad applicability of the technique.
We present the first systematic study of recombination dynamics in InAs QD-SESAMs. Decreasing growth temperature and increasing indium coverage reduces the recovery time from 1500 to 24 ps, leading to shorter pulses in modelocked VECSELs.
Thermal lens shaping for astigmatism compensation is extended to a 65 MHz, diode-pumped Yb:KGW oscillator mode-locked with the aid of a saturable Bragg reflector to yield 250fs (347fs) pulses at an output power of 3.5 W (5W).
We describe the operation of a femtosecond Cr4+:YAG laser that has been mode locked using a novel GaInNAsSb SESAM. 230 fs pulses were generated at an average output power of 280 mW.
We demonstrated passive timing stabilization of mode-locked Ti:sapphire and Yb-fiber oscillators. The timing jitter of two femtosecond laser pulses was 3.2 fs from 10-kHz to 1-Hz integration.
A 10.225-GHz microwave signal is regenerated from a 200.5-MHz repetition rate mode-locked fiber laser with 6.8 fs rms relative timing jitter in 1-MHz bandwidth integrated over 10 hours. This corresponds to a stability of 1.9times10-19.
We show that gain in an OPO with a large walkoff between the pump and signal saturates just like a laser gain and thus CW pumped OPO can be directly mode-locked with high conversion efficiency.
We describe a diode-pumped Cr3+:LiCAF laser which produces 590 mW of continuous-wave output power using two pump diodes. Passive mode locking with a semiconductor saturable absorber mirror produces 97-fs, 2.8-nJ pulses near 800 nm wavelength.
We demonstrate a middle-infrared self-starting Kerr-mode-locked Cr:ZnSe laser operating at 103 MHz repetition-rate with estimated lower limit of the pulse width of 300 fs and output power of 50 mW at 2.4 mum wavelength.
A femtosecond thulium-doped passively modelocked fiber laser with internal dispersion compensation is presented. It generates pulses at a center wavelength of 1985 nm with a dechirped pulse duration of 320 fs and an energy of 3.5 nJ. Pulsed operation is achieved using additive pulse mode locking, dispersion compensation is facilitated by an internal grating arrangement.
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