公开(公告)号：US06374029B1

公开(公告)日：2002-04-16

申请号：US09586756

申请日：2000-06-05

Applicant: Yoshiaki Nakano ,  Byong-Jin Ma

Inventor： Yoshiaki Nakano ,  Byong-Jin Ma

IPC: G02B610

CPC classification number: G02F2/004 ,  G02F1/3511 ,  G02F1/3515 ,  H01S5/204 ,  H01S5/205 ,  H01S5/22 ,  H01S5/509

Abstract: An optical device having a large extinction ratio and being suitable for the digital operation including first and second electrodes (7, 8) formed on both sides of a waveguide structure, respectively such that a carrier-injection region (3a) and a non-carrier injection regions (3b) are formed adjacent to each other in the waveguide structure. When mass carriers are stored in the carrier injection region, its refractive index is reduced lower than the non-carrier-injection regions. In this state, when a light wave with low optical power propagates through the carrier-injection region, since an amount of carriers consumed thereby is small, the refractive index of this region is still lower than the non-carrier-injection regions, and the input light wave is emitted sideways through the non-carrier-injection region. In contrast, when a light wave with high optical power propagates through the carrier-injection region, since the carrier consumption is large, the refractive index of this region (3a) becomes higher than the non-carrier-injection regions (3b), and the input light propagates through a waveguide which is optically induced to extend from the incident surface to the exit surface.

Abstract translation: 一种具有大消光比并且适于数字操作的光学装置，包括分别形成在波导结构两侧的第一和第二电极（7,8），使得载流子注入区域（3a）和非载流子 注入区域（3b）在波导结构中彼此相邻地形成。 当质量载体存储在载流子注入区域中时，其折射率比非载流子注入区域低。 在这种状态下，当具有低光功率的光波传播通过载流子注入区域时，由于其消耗的载流子量小，所以该区域的折射率仍然低于非载流子注入区域， 输入光波通过非载波注入区域侧向发射。 相反，当具有高光功率的光波传播通过载流子注入区域时，由于载流子消耗量大，该区域（3a）的折射率变得高于非载流子注入区域（3b），并且 输入光传播通过光学地被引导以从入射表面延伸到出射表面的波导。

公开(公告)号：US06356382B1

公开(公告)日：2002-03-12

申请号：US09276925

申请日：1999-03-26

Applicant: Yoshiaki Nakano ,  Byong-Jin Ma

Inventor： Yoshiaki Nakano ,  Byong-Jin Ma

IPC: G02F1365

CPC classification number: B82Y20/00 ,  G02F1/3515 ,  G02F1/3556 ,  G02F1/365 ,  G02F2/004 ,  H01S5/4031 ,  H01S5/50 ,  H01S5/5054 ,  H01S5/509

Abstract: An optical wavelength converter, including first and second semiconductor optical amplifiers, in which an input optical pulse signal having a first wavelength &lgr;1 and a non-modulated optical signal having a second wavelength &lgr;2 are made incident upon the first semiconductor optical amplifier. Propagation constants of the first and second semiconductor optical amplifiers are determined such that a propagation constant difference &Dgr;&bgr; between the first and the second semiconductor optical amplifiers when only the optical signal having the second wavelength &lgr;2 propagates along the first semiconductor optical amplifier is smaller than a propagation constant difference &Dgr;&bgr; when both the input optical pulse signal and non-modulated optical signal propagate along the first semiconductor optical amplifier. During a lower power level of the input optical pulse signal, an amplified optical output signal having the second wavelength &lgr;2 emanates from the second semiconductor optical amplifier due to the optical coupling, but during a higher power level of the input optical pulse signal, the optical coupling between the first and second waveguides is substantially released and no optical signal is emitted from the second semiconductor optical amplifier.

Abstract translation: 包括第一和第二半导体光放大器的光波长转换器入射到第一半导体光放大器上，其中具有第一波长lambd1的输入光脉冲信号和具有第二波长lambd2的非调制光信号。 确定第一和第二半导体光放大器的传播常数，使得仅当具有第二波长lambd2的光信号沿着第一半导体光放大器传播时，第一和第二半导体光放大器之间的传播常数差DELTAbeta小于传播 当输入光脉冲信号和非调制光信号沿着第一半导体光放大器传播时，恒定差DELTAbeta。 在输入光脉冲信号的较低功率电平期间，具有第二波长lambd2的放大的光输出信号由于光耦合而从第二半导体光放大器发出，但是在输入光脉冲信号的较高功率电平期间，光 基本上释放第一和第二波导之间的耦合，并且不从第二半导体光放大器发射光信号。