Abstract
We developed a new pulsed-coherent light source for wind sensing by combining a semiconductor
optical amplifier (SOA) with a phase modulator that was operated to produce pulsed serrodyne
modulation. Even though an SOA-based light source has the potential advantages of a small footprint,
monolithic integration, and gain properties, instantaneous frequency deviation inevitably occurs, leading
to measurement errors of wind velocity. We demonstrated the correction of such frequency deviation
using phase modulation with a pulsed sawtooth waveform and clearly demonstrated that the
instantaneous frequency deviation was compensated suffi ciently to achieve residual frequency errors of
0.4 MHz, compared to 40 MHz without correction.
