公开(公告)号：US07265898B2

公开(公告)日：2007-09-04

申请号：US11024319

申请日：2004-12-27

申请人： Shih-Yuan Wang ,  Miao Zhu ,  Zuhua Zhu ,  Haiqing Wei ,  Saif M. Islam

发明人： Shih-Yuan Wang ,  Miao Zhu ,  Zuhua Zhu ,  Haiqing Wei ,  Saif M. Islam

IPC分类号： H01S3/00

CPC分类号： B82Y20/00 ,  H01S5/3413 ,  H01S5/50 ,  H01S5/5027 ,  H01S5/5063 ,  H01S5/5072 ,  H01S2301/02

摘要： A semiconductor optical amplifier (SOA) apparatus and related methods are described. The SOA comprises a signal waveguide for guiding an optical signal along a signal path, and further comprises one or more laser cavities having a gain medium lying outside the signal waveguide, the gain medium being sufficiently close to the signal waveguide such that, when the gain medium is pumped with an excitation current, the optical signal traveling down the signal waveguide is amplified by an evanescent coupling effect with the laser cavity. When the gain medium is sufficiently pumped to cause lasing action in the laser cavity, gain-clamped amplification of the optical signal is achieved. Additional features relating to segmented laser cavities, separate pumping of laser cavity segments, DFB/DBR gratings, current profiling to improve ASE noise performance, coupled-cavity lasers, avoidance of injection locking effects, manipulation of gain curve peaks, integration with a tunable vertical cavity coupler, integration with a photodetector, integration with an RZ signal modulator, and other described features may be used with the evanescent coupling case or with an SOA having a laser cavity gain medium that is coextensive with the gain medium of the signal waveguide.

摘要翻译： 描述了一种半导体光放大器（SOA）装置及相关方法。 SOA包括用于沿着信号路径引导光信号的信号波导，并且还包括一个或多个具有位于信号波导外部的增益介质的激光腔，增益介质足够靠近信号波导，使得当增益 介质用激励电流泵浦，沿信号波导下行的光信号通过与激光腔的ev逝耦合效应放大。 当增益介质被充分泵送以在激光腔中引起激光作用时，实现光信号的增益钳位放大。 与分段激光腔相关的附加特征，激光腔段的独立泵浦，DFB / DBR光栅，电流分析以改善ASE噪声性能，耦合腔激光器，避免注入锁定效应，操纵增益曲线峰值，与可调谐垂直线 空腔耦合器，与光电检测器的集成，与RZ信号调制器的集成以及其它所描述的特征可以与ev逝耦合壳体或具有与信号波导的增益介质共同延伸的激光腔增益介质的SOA一起使用。

公开(公告)号：US06836357B2

公开(公告)日：2004-12-28

申请号：US10006435

申请日：2001-12-04

申请人： Shih-Yuan Wang ,  Miao Zhu ,  Zuhua Zhu ,  Haiqing Wei ,  Saif M. Islam

发明人： Shih-Yuan Wang ,  Miao Zhu ,  Zuhua Zhu ,  Haiqing Wei ,  Saif M. Islam

IPC分类号： H01S300

CPC分类号： B82Y20/00 ,  H01S5/3413 ,  H01S5/50 ,  H01S5/5027 ,  H01S5/5063 ,  H01S5/5072 ,  H01S2301/02

摘要： A semiconductor optical amplifier (SOA) apparatus and related methods are described. The SOA comprises a signal waveguide for guiding an optical signal along a signal path, and further comprises one or more laser cavities having a gain medium lying outside the signal waveguide, the gain medium being sufficiently close to the signal waveguide such that, when the gain medium is pumped with an excitation current, the optical signal traveling down the signal waveguide is amplified by an evanescent coupling effect with the laser cavity. When the gain medium is sufficiently pumped to cause lasing action in the laser cavity, gain-clamped amplification of the optical signal is achieved. Additional features relating to segmented laser cavities, separate pumping of laser cavity segments, DFB/DBR gratings, current profiling to improve ASE noise performance, coupled-cavity lasers, avoidance of injection locking effects, manipulation of gain curve peaks, integration with a tunable vertical cavity coupler, integration with a photodetector, integration with an RZ signal modulator, and other described features may be used with the evanescent coupling case or with an SOA having a laser cavity gain medium that is coextensive with the gain medium of the signal waveguide.

摘要翻译： 描述了一种半导体光放大器（SOA）装置及相关方法。 SOA包括用于沿着信号路径引导光信号的信号波导，并且还包括一个或多个具有位于信号波导外部的增益介质的激光腔，增益介质足够靠近信号波导，使得当增益 介质用激励电流泵浦，沿信号波导下行的光信号通过与激光腔的ev逝耦合效应放大。 当增益介质被充分泵送以在激光腔中引起激光作用时，实现光信号的增益钳位放大。 与分段激光腔相关的附加特征，激光腔段的独立泵浦，DFB / DBR光栅，电流分析以改善ASE噪声性能，耦合腔激光器，避免注入锁定效应，操纵增益曲线峰值，与可调谐垂直线 空腔耦合器，与光电检测器的集成，与RZ信号调制器的集成以及其它所描述的特征可以与ev逝耦合壳体或具有与信号波导的增益介质共同延伸的激光腔增益介质的SOA一起使用。

公开(公告)号：US06714344B2

公开(公告)日：2004-03-30

申请号：US10098913

申请日：2002-03-15

申请人： Saif M. Islam ,  Shih-Yuan Wang

发明人： Saif M. Islam ,  Shih-Yuan Wang

IPC分类号： H01S300

CPC分类号： H01S5/50 ,  B82Y20/00 ,  H01S5/3413 ,  H01S5/5027 ,  H01S5/5063 ,  H01S5/5072 ,  H01S2301/02

摘要： A ballast-powered semiconductor optical amplifier (SOA) apparatus and related methods are described. The SOA comprises a signal waveguide for guiding an optical signal along a signal path, and further comprises one or more ballast lasers positioned with respect to the signal waveguide such that the optical signal is amplified using energy from the lasing fields of the one or more ballast lasers. The problem of relative intensity noise (RIN) transfer from the ballast lasers into the optical signal is avoided by ensuring that the relaxation oscillation frequency (ROF) of each ballast laser is sufficiently higher than the signal modulation rate such that the RIN spectrum is tolerably low at the signal modulation rate. The ROFs themselves are manipulated by methods including adjustment of excitation current densities within the ballast lasers. In multiple-ballast laser embodiments, improvements in amplified spontaneous noise (ASE) performance are achieved where the optical signal gain per unit distance is higher near the SOA input and lower near the SOA output. Embodiments are also described in which multi-segment ballast lasers are used and in which operating points are found that satisfy the RIN noise, ASE noise, and output saturation power criteria.

摘要翻译： 描述了镇流器供电的半导体光放大器（SOA）装置及相关方法。 SOA包括用于沿着信号路径引导光信号的信号波导，并且还包括相对于信号波导定位的一个或多个镇流器激光器，使得使用来自一个或多个镇流器的激光场的能量来放大光信号 激光器 通过确保每个镇流器激光器的弛豫振荡频率（ROF）足够高于信号调制速率，使得RIN频谱容忍度低，可以避免从镇流器激光器到光信号的相对强度噪声（RIN）传递的问题 信号调制率。 ROF本身通过包括调整镇流器激光器内的激发电流密度的方法来操纵。 在多重镇流器激光器实施例中，实现了放大自发噪声（ASE）性能的改进，其中每单位距离的光信号增益在SOA输入附近较高，在SOA输出附近较低。 还描述了使用多段镇流器激光器的实施例，其中发现满足RIN噪声，ASE噪声和输出饱和功率标准的工作点。