Low-threshold tunable soliton source

Ciaran R. O'Cochlain; Robert J. Mears

doi:10.1117/12.141117

23 March 1993 Low-threshold tunable soliton source

Ciaran R. O'Cochlain, Robert J. Mears

Proceedings Volume 1789, Fiber Laser Sources and Amplifiers IV; (1993) https://doi.org/10.1117/12.141117
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

An actively modelocked erbium fiber laser with continuous wavelength tuning over the range 1528 nm - 1565 nm has been demonstrated, with wavelength selection provided by a holographically ruled diffraction grating. A gain-saturated InGaAsP NTW semiconductor optical amplifier (SOA) is used as the active modelocking element in an isolating unidirectional fiber loop mirror. The semiconductor amplifier is driven with a synthesized RF signal source at a harmonic of the passive cavity mode spacing of 1.75 MHz, together with a dc bias current. The SOA is used as an amplitude modulator which provides gain and has < 2 dB polarization dependence. Gain saturation also serves to shape the transmitted laser pulses. The fiber laser is diode pumped at 1480 nm with a threshold of 6 mW, and provides pulses of 25 ps (FWHM) with a transform product of 0.4 and > 12 dBm peak power at a repetition rate of 175 MHz. Modelocked pulse repetition rates up to several GHz should be possible using this fiber laser configuration.

Citation Download Citation

Ciaran R. O'Cochlain and Robert J. Mears "Low-threshold tunable soliton source", Proc. SPIE 1789, Fiber Laser Sources and Amplifiers IV, (23 March 1993); https://doi.org/10.1117/12.141117

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