| 摘要 |
A laser system is disclosed comprising a laser source for producing a laser beam along a beam path, means to stabilize the frequency of the laser beam, at least one optical component which produces back-scattered light when in use, and a phase modulator for modulating the phase of the back-scattered light. The optical component may be a plane mirror or an optical fibre. The phase modulator may be an oscillating glass block, optionally driven by a motor. Alternatively, the phase modulator is a glass block cyclically compressed by a piezoelectric element. |
