| 摘要 |
<p>The present invention concerns a linear wavelength DWDM that is compact and is adapted for use with fibre ribbons. The device of the present invention includes a first (1) and second (5) port in an optically transmissive medium. The first (1) and second (5) ports are in optical communication with each other through a first (2) and second (4) mirror and a diffraction grating (3). Preferably, the first mirror (2) is located opposite the first port (1), and is off-axis with respect to the optical axis. The diffraction grating (3) is located on the same side as the input port (1), and is in optical communication with the first mirror (2). The second mirror (4) is located on the same side as the first mirror (2) and is in optical communication with the diffraction grating (3). The output port (5) is slightly off-axis with respect to the optical axis of the second mirror (4) and is in optical communication therewith. The device of the present invention can be used as a multiplexer, where the second port (5) is used as the input, or as a demultiplexer, where the first port (1) is used as the input. The various parameters of the device are optimised so that the second port permits connection of a fibre ribbon. The device compensates for the non-linear relationship between equally spectrally spaced wavelengths and physically spaced wavelengths once they have been diffracted.</p> |
