| 摘要 |
<p>Optical terminal (1) has optical waveguides (6), 3-dB couplers (7), laser diodes (8, 20), laser diodes (22, 23) with gratings (21), and connections (24, 25) on substrate (5) of semiconductor material. The grating (21) laser diodes (22, 23) have external cavity formed by the waveguides (6) and delimited by mirrors (29). The laser diodes have each an electrical connection (30) through which the diodes are switched between light-absorbing, light amplifying and light-emitting modes, by electric current signals, and the diodes can also detect a light signal. The terminal (1) can perform several functions example: receive, detect, amplify and transmit a light signal. Generate a narrowband light signal of desired wavelength within a broad wavelength area through the grating diodes (22, 23) and amplify and transmit the signal. Receive a light signal having several wavelengths and to amplify and detect a selected one of the wavelengths through the cavity diodes (22, 23). Perform coherent reception of a light signal. Transmit a phase-modulated light signal. The terminal (1) comprises few types of components.</p> |
