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A fully integrated self-referenced Er-fiber frequency-comb system without the use of highly nonlinear or microstructured fiber is demonstrated. We use a single PPLN-waveguide for both spectral broadening and 2f-to-3f CEO-phase detection.
An optically integrated frequency-comb-system based on a passively-mode locked, fCEO-locked Er:soft-glass-fiber-laser and a PPLN-waveguide phase-sensor is demonstrated. The oscillator emits pulses with 61 nm spectral bandwidth and 170 MHz repetition frequency.
Synchronization of actively Q-switched Erbium and Ytterbium doped fiber lasers with a single electrostatically actuated deformable metallic micro-mirror is reported. Sum frequency generation in PPLN crystal leading to a tunable red radiation is demonstrated.
We fabricate wavelength conversion modules for 3.4 and 2.3 micron difference frequency generation using the V-groove connection technique. Both modules exhibit high output powers of over 3 mW.
All-optical AND and NAND gates have been demonstrated in a Ti-diffused periodically poled LiNbO3 channel waveguide which has two second phase-matching peaks by cascaded sum frequency generation/difference frequency generation and sum frequency generation processes.
We have experimentally demonstrated 8 times 10 Gbit/s modified duo-binary RZ (MD-RZ) signal repeaterless transmission over a record length of 240 km standard fibre (SMF-28). A Raman amplifier was used to enhance the OSNR and extend the repeaterless transmission distance with low receiver penalty.
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