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Schematic diagram of the GaInN MOPA system.
Optical spectra of the (a) MLLD output and (b) SOA output. For the SOA output spectra in (b), both situations with (solid line) and without (dashed line) pulse injection are shown.
(a) Average optical output power without an optical BPF vs the SOA current. The 91% light coupling efficiency of the collimating lens has been accounted for. (b) Average optical output power after passing through the BPF vs the SOA current. The collimating lens and the 60% BFP transmission efficiency have been corrected for. Both graphs show SOA output with pulse injection (circle) and without injection (diamond).
(a) Streak-camera traces for output pulses from the passively mode-locked LD and amplified pulses from the SOA. Each waveform is obtained by numerically averaging 100 frames of waveforms taken with the single-shot mode of the streak-camera. (b) The peak power of the amplified optical pulses as a function of the SOA current. The upper and lower limits are indicated by the circle and triangle, respectively.
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