Wavelength tunable and ultra stable pulse generation at 10GHz is experimentally demonstrated using a non-PM, regeneratively mode-locked fiber ring laser. Less than 2.0 ps, nearly transform-limited, sech2-shaped pulses are directly generated with supermode noise suppression ratio over 70dB and RMS timing jitter value less than 162 fs. Dispersion management has been exploited in order to obtain the shortest pulse duration at 1.1ps. The mechanisms for the super-mode noise suppression are also discussed.
In this paper, an optical code division multiple access (OCDMA) system is demonstrated. The ultrashort light pulse is encoded and then decoded by amplitude sampled fiber Bragg gratings with equivalent phase shift (EPS). Compared with traditional superstructured fiber Bragg grating (SSFBG) with real phase shift (RPS), FBG with EPS is much easier to fabricate. In our experiment, it shows its full ability to perform encoding and decoding in OCDMA systems, and good encoding/decoding performance is achieved.
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