首页>
外国专利>
Pair of optically locked semiconductor narrow linewidth external cavity lasers with frequency offset tuning
Pair of optically locked semiconductor narrow linewidth external cavity lasers with frequency offset tuning
展开▼
机译:一对具有频率偏移调谐功能的光学锁定半导体窄线宽外腔激光器
展开▼
页面导航
摘要
著录项
相似文献
摘要
An optical phase lock loop (OPLL) system is disclosed that includes a master external cavity laser (ECL), and a substantially identical slave ECL. The master and slave ECLs are fabricated using a planar semiconductor device with waveguide-integrated planar Bragg gratings (PBG). Both the master and slave ECLs have a narrow linewidth and a low frequency-noise. Each of the ECLs has their own controller-modulator circuits for thermal tuning or electrical tuning via direct modulation. A laser-select-logic (LSL) module receives and processes a filtered phase error signal from a loop filter coupled to an electronic PLL device, and directs the processed phase error signal to one or both of the master and slave controller-modulators according to a logical determination of a required mode of operation of the OPLL system in order to achieve a stable and identical phase performance of the master and the slave ECLs. The required mode of operation is chosen from a locking mode, a prediction mode, a tracking mode, and a searching mode.
展开▼