| 摘要 |
A mode-locked fiber laser comprises an L-band optical fiber amplifier, conveniently an erbium-doped fiber amplifier, operable at wavelengths from about 1565 nm to about 1610 nm and a pumping device, such as a diffraction grating havi ng a reflection wavelength range from about 1525 nm to about 1565 nm. The pumping device comprises a pump source for the L-band EDFA and a fiber Bragg grating that effectively converts the amplified spontaneous emission produced in the lower range of wavelengths to energy at wavelengths in the higher range so that the laser provides a useful output in the L-band range of wavelengths. In one preferred embodiment of the invention, a figure-eight laser can operates to generate stable soliton pulses with width s as short as 200 fs in the L-band wavelength range (1565 nm - 1610 nm). The laser may produce a tunable single wavelength CW, or dual wavelength CW light.
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