公开(公告)号：US06856450B2

公开(公告)日：2005-02-15

申请号：US10122804

申请日：2002-04-15

Applicant: Aref Chowdhury ,  Robert Meachem Jopson

Inventor： Aref Chowdhury ,  Robert Meachem Jopson

IPC: G02F1/355 ,  G02F2/02 ,  G02F1/35

CPC classification number: G02F2/02 ,  G02F2203/56

Abstract: An optical comb generator includes frequency-shifting elements of a particular type that we refer to as a “frequency mirror.” A frequency mirror mixes input light at a signal frequency and a reference frequency to produce output light at a third frequency that lies in contraposition to the signal frequency relative to the reference frequency. The comb generator includes at least two frequency mirrors, having respective reference frequencies F1 and F2. At least some of the power of a light beam is shifted by the first frequency mirror from an input frequency to a frequency that lies in contraposition thereto relative to F1, and then light at the shifted frequency is shifted to yet a new frequency by the second frequency mirror. The resulting twice-shifted frequency lies in contraposition to the once-shifted frequency, relative to F2. The result is that a difference of 2(F2−F1) separates the twice-shifted frequency from the input frequency. This process is repeatable to generate a comb of equally spaced, shifted frequencies. In specific embodiments of the invention, the frequency mirror is a periodically poled lithium niobate (PPLN) device pumped by laser radiation at the pertinent reference frequency.

Abstract translation: 光梳发生器包括我们称为“频率镜”的特定类型的频移元件。 频率镜以信号频率和参考频率混合输入光，以产生与相对于参考频率的信号频率相对的第三频率的输出光。 梳状发生器包括至少两个具有相应参考频率F1和F2的频率镜。 光束的至少一部分功率被第一频率镜从输入频率偏移到与F1相对应的频率，然后移位频率的光被第二频率转移到新的频率 频率镜。 所产生的两次移位的频率与相对于F2的一次移动频率相对。 结果是2（F2-F1）的差异将两倍频率与输入频率分开。 该过程是可重复的，以产生等间隔移位频率的梳。 在本发明的具体实施例中，频率镜是在相关参考频率下通过激光辐射泵浦的周期性极化铌酸锂（PPLN）器件。

公开(公告)号：US06433919B1

公开(公告)日：2002-08-13

申请号：US09575040

申请日：2000-05-19

Applicant: Aref Chowdhury ,  Leon McCaughan

Inventor： Aref Chowdhury ,  Leon McCaughan

IPC: G02F1365

CPC classification number: G02F2/004 ,  G02F1/3534

Abstract: A two-dimensional second order nonlinear lattice formed in a lattice body is utilized for performing a one-step optical carrier wavelength interchange between pairs of input optical signals. The lattice body includes sensitized regions arranged in a two-dimensional array in a matrix material with the sensitized regions differing from the matrix material in the sign of the second order susceptibility. When an optical pump signal is coupled to the lattice body at a frequency corresponding to the sum of the frequencies of the two input signals, nonlinear interactions in the lattice body produce wavelength interchange between the input signals, resulting in angularly deflected optical signals exiting the lattice body in which the signal information on the input signals is interchanged between the carrier frequencies of the two input signals. The apparatus can be utilized to provide switching of optical signals and wavelength interchange for applications such as in wavelength division multiplexed communication systems.

Abstract translation: 在晶格体中形成的二维二阶非线性晶格被用于在输入光信号对之间执行一步光载波波长交换。 晶格体包括以矩阵材料二维阵列布置的敏化区域，其中敏感区域与基质材料不同于二阶易感性的符号。 当光泵浦信号以对应于两个输入信号的频率之和的频率耦合到晶格体时，晶格体中的非线性相互作用产生输入信号之间的波长交换，导致离开晶格的角度偏转的光信号 其中输入信号的信号信息在两个输入信号的载波频率之间互换。 该装置可以用于为诸如波分复用通信系统之类的应用提供光信号和波长交换的切换。