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Summary form only given. Here, we exploit the tuning property of the fiber Raman oscillator to demonstrate bit-rate tracking for possible application as a self-locking all-optical clock recovery system. Our oscillator consists of 3 km of single-mode silica fiber forming a loop with the two ports of a dichroic 1550/1650 fiber coupler.
Summary form only given. Our technique directly gives the Raman gain without requiring a tunable probe, calibration or absolute measurement of Raman signal. We send intense square shaped pulses near 1550 nm into 1 length of fiber and measure the stimulated Raman signal as a function of pulse duration.
Coherent transform-limited picosecond pulses have been generated with a GaAlAs laser in a Selfoc lens extended resonator. The Selfoc lens forms a high-Q resonator which is compact and mechanically stable. The spatial profile of the output beam is Gaussian with an aspect ratio near unity.
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