| 摘要 |
PCT No. PCT/GB94/00556 Sec. 371 Date Oct. 10, 1995 Sec. 102(e) Date Oct. 10, 1995 PCT Filed Mar. 18, 1994 PCT Pub. No. WO94/22187 PCT Pub. Date Sep. 29, 1984A laser having two feedback elements at least one which is wavelength selective, is provided with a demountable optical connector located between the gain medium of the laser and the wavelength selective feedback element. An optical waveguide is utilized to direct optical radiation between the demountable optical connector and the wavelength selective feedback element. The demountable optical connector, for example, a mechanical fibre connector allows the wavelength selective feedback element, for example, a fibre grating, to be exchanged cheaply, simply and quickly, and thus allows the wavelength of operation of the laser to be altered.
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