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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.
A 12.5 GHz-spaced optical frequency comb spanning 1380 nm to 1820 nm is generated via filtering and nonlinearly broadening a 250 MHz-spaced comb. Sidemode suppression from 1380 nm to 1630 nm has been measured.
We have successfully designed, built and operated a microlaser based on a AlGaInAs multiple quantum well (MQW) semiconductor saturable absorber (SESA). Optical characterization of the semiconductor absorber, as well as, the microlaser output is presented.
We demonstrate efficient generation of a Raman-type optical-frequency-comb by employing adiabatic-Raman-excitation in an enhancement cavity. A broad frequency-comb spanning over 130-THz is realized with an excitation-power reduction exceeding three-orders of magnitude compared with a single-pass-configuration.
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