首页>
外国专利>
A tunable bragg grating, a tunable laser diode using same, and a corresponding method
A tunable bragg grating, a tunable laser diode using same, and a corresponding method
展开▼
机译:可调布拉格光栅,使用该光栅的可调激光二极管以及相应的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A spatially modulated waveguide Bragg grating mirror is suspended over a substrate by plurality of fingers (119a,19b,118a,118b) extending laterally away from the waveguide centerline (107). The positions of the fingers are coordinated with the positions of crests (116-1) and valleys (116-2) of amplitude or phase modulation of the Bragg grating (100), to avoid disturbing the Bragg grating when it is tuned by heating. When the Bragg grating is heated, the heat flows through the fingers creating a quasi-periodic refractive index variation along the Bragg grating due to quasi-periodic temperature variation created by the heat flow from the grating through the supporting fingers. Due to coordination of the positions of supporting fingers with positions of the crests and valleys of modulation, the optical phase coherence is maintained along the Bragg grating, so that the spectral lineshape or filtering property of the Bragg grating is substantially preserved.
展开▼