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    • 10. 发明授权
    • Tunable laser source with an integrated wavelength monitor and method of operating same
    • 具有集成波长监视器的可调谐激光源及其操作方法
    • US06714566B1
    • 2004-03-30
    • US09914728
    • 2002-01-03
    • Larry A. ColdrenThomas Gordon Beck MasonGregory Fish
    • Larry A. ColdrenThomas Gordon Beck MasonGregory Fish
    • H01S310
    • H01S5/0687H01S5/026H01S5/0264H01S5/06256
    • A wavelength monitor is provided based on the transmission response of an optical filter. The monitor provides feedback to the laser enabling it to lock to any given wavelength within its tuning range. The invention is also a process for integrating the wavelength monitor directly on chip with a variety of tunable semiconductor lasers. The invention also comprises a method for controlling the wavelength of a tunable laser by using a wavelength monitor to measure the output light and provide feedback to a control system. The laser and wavelength monitor are integrated together on a single indium phosphide chip. The wavelength monitor comprises a filter with a wavelength dependent transmission function and a pair of detectors. One detector is illuminated with light that has passed through the filter and the other provides a reference to measure the input intensity. Taking the ratio of the filtered light level to the unfiltered light provides a wavelength dependent wavelength. The filter is designed such that the transmission function is monotonic and varies from a minimum at one extent of the laser's tuning range to a maximum at the other extent.
    • 基于滤光器的透射响应提供波长监视器。 监视器为激光器提供反馈功能,使其能够锁定到其调谐范围内的任何给定波长。 本发明也是将波长监视器直接集成在各种可调谐半导体激光器上的过程。 本发明还包括一种通过使用波长监视器来测量可调激光器的波长以测量输出光并向控制系统提供反馈的方法。 激光和波长监测器集成在一个磷化铟芯片上。 波长监视器包括具有波长依赖传输功能的滤波器和一对检测器。 一个检测器用已经通过过滤器的光照亮,另一个检测器用于测量输入强度。 将滤光光级与未过滤光的比率提供波长相关的波长。 滤波器被设计成使得透射功能是单调的,并且在激光器的调谐范围的一个程度上的最小值在另一个程度上变化到最大值。