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A Q-switched, mode-locked fiber laser based on cavity loss modulation at a subharmonic frequency of the fundamental intermode frequency spacing is experimentally demonstrated. This simple approach is shown to be capable of producing high quality Q-switched, mode-locked pulses.
The generation of ultrashort optical pulses by semiconductor lasers has been extensively studied for many years. A number of methods, including gain-/Q-switching and different types of mode locking, have been exploited for the generation of picosecond and sub-picosecond pulses [1]. However, the shortest pulses produced by diode lasers are still much longer and weaker than those that are generated...
A 22 GHz AlInGaAs two-section mode-locked laser is presented here. 860 fs optical pulses with timing jitter of 280 fs (1 Hz–100 MHz) are generated by direct RF modulation of the saturable absorber.
Mode-locked lasers show femtosecond and even attosecond level short term timing jitter. Such ultralow jitter sources enable novel systems. Timing distribution systems for next generation light sources and prototype high-speed, high-resolution photonic analog-to-digital converters are demonstrated.
We demonstrate a Sampled Grating-Distributed Bragg Reflector (SG-DBR) laser offset locked at 6.5 GHz from a diode mode-locked laser comb using an integrated optical phase-locked loop (OPLL).
A hybrid silicon colliding pulse mode-locked laser with an integrated passive waveguide section is shown. The laser operates at 18GHz with a 20dB RF bandwidth of 1.6MHz.
Employing a nanotube-based saturable absorber, we demonstrate a continuously tunable (1533–1563nm) ultrafast fiber laser, with output pulsewidth switchable between picosecond (1.2 ps) and femtosecond (610 fs) regimes.
We demonstrate a novel saturable absorber based on diamond thin film directly synthesized on quartz substrates by microwave plasma chemical vapor deposition method. The function of mode-locking for the fiber laser is achieved utilizing the diamond thin film.
We demonstrate a dual-wavelength, carbon nanotube mode-locked Er fiber laser. The laser outputs two wavelengths at 1549nm and 1562nm, and each wavelength corresponds to pulse duration of ∼1.3ps and repetition rate of ∼11.27MHz.
A graphene based saturable absorber (SA) on stable mode-locked fiber laser (MLFL) employing nano-micro dispersant is proposed. A short pulse of 382 fs and 3-dB bandwidth of 6.66 nm were obtained. This study demonstrates that a homogeneously dispersed graphene SA is necessary for producing stable-ultrafast and high-performance MLFLs.
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