| 摘要 |
PURPOSE:To improve detection sensitivity with a rather simple constitution by locking a master laser beam and a slave laser beam through frequency offset. CONSTITUTION:Against a master laser diode 82, a slave laser diode 84 is made to offset only by predetermined frequency and to lock. And thereby, at a laser Doppler speedometer 80, a slave laser beam L7 can be maintained to be fre quency that is offset only by frequency omega against frequency which is one of components of a master laser beam L6. Consequently, a measurement beam with much intensified beam strength can be obtained and measuring sensitivity can be improved by such extent thereof. |
