| 摘要 |
<p>A laser having two feedback elements (17, 11), at least one which (11) is wavelength selective, is provided with a demountable optical connector (3, 13) located between the gain medium of the laser and the wavelength selective feedback element (11). An optical waveguide (3, 13) is utilised to direct optical radiation between the demountable optical connector (3, 13) and the wavelength selective feedback element (11). The demountable optical connector, for example a mechanical fibre connector (3, 13), 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.</p> |
