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We demonstrate a 10-GHz multiwavelength pulsed generator based on a fiber optical parametric oscillator. By introducing two separated intracavity branches, simultaneous mode-locking at two different wavelengths in the L-band is achieved. Due to the parametric process between the pump and the two mode-locked signals, two idlers are generated in the S-band. Hence, simultaneous generation of a 10-GHz...
The properties of mode couplings in chiral long period gratings (CLPGs) and conventional uniform long period gratings (LPGs), including the mode selective rules, polarization selectivity and coupling strengths, are analyzed for comparison, by using the coupled-mode theory. For a CLPG, whether a mode coupling is polarization-selective or not depends on different mode selective rules. While for a uniform...
A chiral fiber grating (CFG) formed by twisting a high-birefringence (Hi-Bi) fiber with a linearly varying twist rate is proposed to realize an all-fiber broadband circular polarizer. For the first time, by coating CFG with a higher index material and using the leakage property of leaky modes, the coupling of the core mode to a leaky mode is introduced to achieve a desired extinction ratio. Further,...
Single-longitudinal-mode fiber optical parametric oscillator is realized by resonating independently the signal and idler frequencies in two separate optical cavities, combined with a sub-ring cavity inserted into the signal cavity.
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