首页>
外国专利>
HIGH PRECISION WAVELENGTH MEASUREMENT AND CONTROL OF A TUNABLE LASER
HIGH PRECISION WAVELENGTH MEASUREMENT AND CONTROL OF A TUNABLE LASER
展开▼
机译:高精度波长测量和可调激光的控制
展开▼
页面导航
摘要
著录项
相似文献
摘要
A tunable laser wavelength measurement system includes an interferometric wavelength tracking system that uses a combination of interferometric and wavelength reference measurements to directly measure the laser output wavelength, The measurement exhibits the following desirable error signal characteristics: directional information, continuity, low latency, absolute information, high accuracy, high precision, and little or no drift, A tunable laser wavelength control system additionally incorporates electronics to compare the measured laser wavelength to a desired wavelength or wavelength function, and to generate a feedback control signal to control the wavelength of the laser output based on the comparison. In one non-limiting example implementation, the desired wavelength function is repetitive. The difference between the desired wavelength function and the interferometrically-measured wavelength function is taken, and a successive approximation technique is employed to calculate and adjust a repetitive controlling signal to obtain the desired wavelength function.
展开▼