| 摘要 |
<p>A superluminescent source (1) emits a wide-band light beam, that is frequency modulated by a filter (3, 13) with a pass band centred on a frequency that is made to vary according to a predetermined law so as to frequency modulate the light beam. Means for splitting and recombining beams (5; 21, 22; 32) determine a mutual phase shift between two components of the beam that depends on the physical magnitude to be measured and is detected by a detector (8) as an indication of the value of the magnitude itself. <IMAGE></p> |
