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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 will present state of the art performance of monolithically integrated 500 Gb/sec and 1 Tb/s coherent transmitter and receiver PICs with integrated multi-channel tunable laser arrays optimized for coherent transmission.
The adiabatic chirp for antireflection/high-reflection DFB laser is mostly dependent on high-reflection facet phase independently of the antireflection quality while very low reflectivity allows chirp predicting from the laser emission spectrum.
An electrically driven photonic-crystal nanocavity laser with a buried heterostructure exhibits a record low threshold current of 14 µA at 25°C. High-temperature operation up to 95°C is achieved by using the InGaAlAs-based multiple-quantum-well active region.
All-fiber-based narrow linewidth nanosecond pulsed lasers in MOPA configuration are reviewed, and their applications in nonlinear frequency conversion are discussed.
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.
We study the wavelength aging behavior of 100mW high-power semiconductor lasers. Using in-situ high-resolution wavelength measurement, the activation energy is determined to be 0.96eV based on the wavelength aging data. Physical model of the aging behavior is discussed.
We proposed a fiber Bragg grating based Pr3+-doped down conversion fiber lasers for red and green light generation. Numerical simulations investigate both steady state and Q-switching dynamics that qualitatively agree well with previous experimental demonstrations.
We review the technique of spectral beam combining and discuss detailed limitations in the laser systems used for combination of multiple cw and pulsed fiber amplifiers to kW average power and mJ's of pulse energy.
We present active phase-locking of fiber amplifiers using Walsh coded modulations. Numerical simulations demonstrate the potential of this technique to tag multiple fibers with a single frequency and enhance power scaling capability.
A diode pumped CW Erbium (Er)-doped Zr-Ba-La-Al-Na (ZBLAN) fluoride glass fiber laser operating at 2.78 µm was demonstrated using a guided mode resonance filter (GMRF) as an external cavity mirror.
A single frequency, mode hoping free, narrow linewidth laser system has been developed to generate high repetition rate picosecond UV pulses with MW peak power. Preliminary measurements have shown the generation of 402.5MHz/80ps pulses at high extinction ratio and single frequency operation. The laser parameters are promising in the application of laser assisted H− beam stripping at the Spallation...
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