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The effect of optical feedback is investigated for a quantum-dash-based passive mode-locked laser. We observe a drastic reduction of the radio frequency spectrum linewidth even beyond the onset of coherence collapse.
We report the continuous mode-locked operation of a picosecond, singly-resonant, synchronously-pumped optical parametric oscillator (SPOPO) based on ZGP. The ZGP SPOPO emits in the 4-6 μm range with signal power higher than 800 mW.
We demonstrate photonic generation of square waveform using fiber optical parametric oscillator without the external signal source. Stable square waveform pulse train at the repetition rate of 1.133 GHz is achieved.
We proposed the use of a femtosecond optical frequency comb for length measurement based on pulse trains' destructive interference. The theoretical derivation shows that the present technique offers a significantly different approach to length measurement. Preliminary experiment results of the destructive interference with different pairs of pulse trains show the possibility of the proposal method.
The operation of a 24 nm wavelength tunable self-starting, passively harmonic modelocked, figure-eight laser is experimentally demonstrated. Stable pulses with near half dutycycle are produced at repetition rates of up to 2.72 GHz at 1550 nm wavelength.
A passively mode-locked optically-pumped InGaAs/GaAs quantum well laser with an intracavity semiconductor saturable absorber mirror emits sub-100-fs pulses. Pulse energy declines steeply as pulse duration is reduced below 100 fs due to gain saturation.
We have investigated the THz emission from lithium ternary chalcopyrite crystals illuminated femtosecond pump laser pulses. THz emission from the coherent phonon in LiInSe2 and LiGaSe2 are observed at 2.87 and 3.45 THz respectively.
Simultaneous determination of both carrier-envelope offset (CEO) frequencies of passively synchronized mode-locked Yb-fiber and Er-fiber lasers has been demonstrated by measuring the heterodyne beats between the Yb-fiber laser and the self-referenced Er-fiber laser combs around 1050 nm.
We use quantum well intermixing to monolithically integrate non-absorbing mirrors in 3.7mm long GaAs/AlGaAs colliding-pulse mode-locked lasers and improve their output power by 40% by increasing the threshold for catastrophic optical mirror damage.
A semiconductor laser is mode-locked by phase modulation at one-half the free spectral range of an intra-cavity etalon. The optical comb-lines are locked to the transmission peaks of the etalon using a Pound-Drever-Hall scheme.
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