Coherent optical mixer and a method of coherent detection of light

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	Coherent optical mixer and a method of coherent detection of light
其他题名	Coherent optical mixer and a method of coherent detection of light
	CHAPMAN, DAVID J.; DOUGHERTY, DAVID J.
	2010-01-21
专利权人	LUMENTUM OPERATIONS LLC
公开日期	2010-01-21
授权国家	美国
专利类型	发明申请
摘要	A coherent planar lightwave circuit (PLC) optical mixer chip is described comprising a matched pair of symmetrical four-coupler interferometers for in-phase and in-quadrature detection of two polarization components of light using a polarization diversity arrangement. The waveguide structure of the chip is symmetrical about two orthogonal central axes of the chip, whereby the effect of temperature gradients on the mixer is reduced. A light traveling from an input to an output of any of the two interferometers is cross-coupled by one of the two couplers it passes through, and is bar-coupled by the other of the two couplers, so as to compensate for polarization, wavelength, and manufacturing process dependence of bar-coupling with that of cross-coupling.
其他摘要	描述了一种相干平面光波电路（PLC）光学混频器芯片，包括一对匹配的对称四耦合器干涉仪，用于使用极化分集装置对光的两个偏振分量进行同相和正交检测。芯片的波导结构关于芯片的两个正交中心轴对称，由此降低了温度梯度对混频器的影响。从两个干涉仪中的任何一个的输入端输出到另一个输出端的光通过它通过的两个耦合器中的一个交叉耦合，并且由两个耦合器中的另一个耦合，以便补偿偏振，波长。和条形耦合的制造过程依赖于交叉耦合。
主权项	A planar lightwave circuit (PLC) coherent mixer chip having a longitudinal and a lateral central axis in the plane of the chip, wherein the chip comprises: a first and a second input port for receiving a first and a second portion of an input signal, respectively; a third input port disposed between the first and the second input ports for receiving a local oscillator (LO) signal; a Y-coupler for separating the LO signal into first and second LO sub-signals, wherein the Y-coupler has an input optically coupled to the third input port, and a first and a second output; a first, a second, a third, and a fourth input waveguide for inputting light, optically coupled to: the first input port, the first output of the Y-coupler, the second output of the Y-coupler, and the second input port, respectively; a first, a second, a third, and a fourth coupler each having an input for inputting light and a first and a second output for outputting light, wherein the inputs of the first, the second, the third, and the fourth couplers are optically coupled to the first, the second, the third, and the fourth input waveguides, respectively; a fifth, a sixth, a seventh, and an eighth coupler each having a first and a second input for inputting light, and an output for outputting light; a first waveguide path for optically coupling the first output of the first coupler to the first input of the fifth coupler; a second waveguide path for optically coupling the second output of the first coupler to the first input of the sixth coupler; a third waveguide path for optically coupling the first output of the second coupler to the second input of the fifth coupler; a fourth waveguide path for optically coupling the second output of the second coupler to the second input of the sixth coupler; a fifth waveguide path for optically coupling the first output of the third coupler to the first input of the seventh coupler; a sixth waveguide path for optically coupling the second output of the third coupler to the first input of the eighth coupler; a seventh waveguide path for optically coupling the first output of the fourth coupler to the second input of the seventh coupler; an eighth waveguide path for optically coupling the second output of the fourth coupler to the second input of the eighth coupler; a first, a second, a third, and a fourth output waveguide for outputting light, optically coupled to the outputs of the fifth, the sixth, the seventh, and the eighth couplers, respectively; a first output port optically coupled to the first output waveguide, for outputting a first phase component of the first portion of the input signal; a second output port optically coupled to the second output waveguide, for outputting a second phase component of the first portion of the input signal; a third output port optically coupled to the third output waveguide, for outputting a first phase component of the second portion of the input signal; and a fourth output port optically coupled to the fourth output waveguide, for outputting a second phase component of the second portion of the input signal; wherein the first waveguide path is symmetrical about the longitudinal central axis with the eighth waveguide path; wherein the second waveguide path is symmetrical about the longitudinal central axis with the seventh waveguide path; wherein the third waveguide path is symmetrical about the longitudinal central axis with the sixth waveguide path; and wherein the fourth waveguide path is symmetrical about the longitudinal central axis with the fifth waveguide path.
申请日期	2009-06-09
专利号	US20100014802A1
专利状态	授权
申请号	US12/480956
公开（公告）号	US20100014802A1
IPC 分类号	G02B6/00 \| G02B6/26 \| G02B6/42 \| G01B9/02
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/54089
专题	半导体激光器专利数据库
作者单位	LUMENTUM OPERATIONS LLC
推荐引用方式 GB/T 7714	CHAPMAN, DAVID J.,DOUGHERTY, DAVID J.. Coherent optical mixer and a method of coherent detection of light. US20100014802A1[P]. 2010-01-21.