Subnanosecond optical pulses with 0.8-1.8 ㎛ wavelength are generated by realizing the single pass fiber Raman laser experimentally. This fiber Raman laser is pumped by a mode-locked and Q-switched Nd-YAG laser. Two wave sum frequency phenomena is also observed.
Also dispersion characteristics of a single mode fiber are investigated and measured using the subnanosecond pules described above.
Finally the time dispersion tuned fiber Raman oscillator is studied theoretically and the threshold power required for oscillation is estimated.