Optically tunable Fabry Perot microelectromechanical resonator
    11.
    发明授权
    Optically tunable Fabry Perot microelectromechanical resonator 失效
    光学可调Fabry Perot微机电谐振器

    公开(公告)号:US06714565B1

    公开(公告)日:2004-03-30

    申请号:US09704004

    申请日:2000-11-01

    IPC分类号: H01S310

    摘要: A tunable optical resonator whose resonance frequency is determined by a light signal introduced into the resonator. The resonator includes an optical cavity having a first mirror and a second mirror. The first mirror and second mirror are supported relative to one another such that the distance between the first and second mirrors may be altered by applying a force to said second mirror thereby altering the resonance frequency of said cavity. The resonator includes a light input port for receiving a tuning light signal, and a light signal generator for generating the tuning light source. The tuning light signal is introduced into the optical cavity such that the tuning light signal is reflected between the first and second mirrors. In the absence of the tuning light signal, the resonator has a resonance characterized by a resonance response curve centered at &lgr;0. The tuning light signal has a wavelength &lgr;1 within said resonance response curve and sufficient power to cause said resonance response curve to shift such that the resonance response curve is now centered at &lgr;2, where &lgr;2>&lgr;1. In one embodiment of the invention, a circuit for monitoring the light leaving the resonator is utilized to control the wavelength and/or amplitude of the tuning light signal such that the light leaving the resonator has a predetermined wavelength.

    摘要翻译: 可调谐光谐振器,其谐振频率由引入谐振器的光信号决定。 谐振器包括具有第一反射镜和第二反射镜的光学腔。 第一反射镜和第二反射镜相对于彼此支撑,使得可以通过向所述第二反射镜施加力而改变第一和第二反射镜之间的距离,从而改变所述空腔的共振频率。 谐振器包括用于接收调谐光信号的光输入端口和用于产生调谐光源的光信号发生器。 调谐光信号被引入到光腔中,使得调谐光信号在第一和第二反射镜之间被反射。 在没有调谐光信号的情况下,谐振器具有以以λ0为中心的谐振响应曲线的共振特征。 调谐光信号在所述谐振响应曲线内具有波长λ1,并具有足以使所述共振响应曲线移位的功率,使得谐振响应曲线现在以λ2为中心,其中λ2>λ1。 在本发明的一个实施例中,用于监测离开谐振器的光的电路用于控制调谐光信号的波长和/或振幅,使得离开谐振器的光具有预定的波长。

    Tunable Fabry-Perot filters and lasers utilizing feedback to reduce frequency noise
    12.
    发明授权
    Tunable Fabry-Perot filters and lasers utilizing feedback to reduce frequency noise 失效
    可调谐的法布里 - 珀罗滤波器和激光器利用反馈来降低频率噪声

    公开(公告)号:US06538748B1

    公开(公告)日:2003-03-25

    申请号:US09550548

    申请日:2000-04-14

    IPC分类号: G01B902

    摘要: A tunable optical cavity constructed from a fixed mirror and a movable mirror is disclosed. A circuit applies an electrical potential between first and second electrically conducting surfaces thereby adjusting the distance between the fixed and movable mirrors. The fixed mirror and the moveable mirror are positioned such that the mirrors form the opposite ends of the optical cavity. The distance between the fixed mirror and the moveable mirror is a function of the applied electrical potential. The thermally induced vibrations are reduced by utilizing an electrical feedback circuit that measures the distance between the mirrors. The feedback circuit dynamically changes the potential between the substrate and the support member so as to reduce fluctuations in the cavity resonance frequency.

    摘要翻译: 公开了一种由固定镜和可移动镜构成的可调光学腔。 电路在第一和第二导电表面之间施加电势,从而调节固定镜和可移动镜之间的距离。 固定镜和可动镜被定位成使得镜形成光腔的相对端。 固定镜与可动镜之间的距离是施加电位的函数。 通过利用测量反射镜之间的距离的电反馈电路来减少热诱导的振动。 反馈电路动态地改变衬底和支撑构件之间的电位,以便减小空腔谐振频率的波动。

    Self-tuned mode-locked laser
    13.
    发明授权
    Self-tuned mode-locked laser 失效
    自调谐锁模激光器

    公开(公告)号:US5509022A

    公开(公告)日:1996-04-16

    申请号:US211093

    申请日:1994-06-10

    摘要: A self-tuning mode locked semi-conductor laser automatically adjusts itself to produce short (less than 200 ps and preferably less than 50 ps) stable optical pulses. Tuning is achieved by means of a feedback loop which includes a spectrum analyzer (18) which receives a small amount of the optical output of the laser and monitors the spectral wavelength, spectral width or spectral shape of the output. A controller (19) is connected to said analyzer and produces a control signal based on said spectral information. The control signal causes adjustment of one or more parameters influencing operation of said laser, such as frequency or power of an RF drive signal, level of dc bias, cavity length, for example, in order to produce said short stable pulses.

    摘要翻译: PCT No.PCT / AU92 / 00496 Sec。 371日期:1994年6月10日 102(e)日期1994年6月10日PCT提交1992年9月18日PCT公布。 公开号WO93 / 06642 日期:1993年4月1日。自调谐模式锁定半导体激光器自动调整自身,以产生短(小于200 ps,优选小于50 ps)稳定的光脉冲。 通过反馈回路实现调谐,该反馈回路包括频谱分析器(18),该频谱分析器接收少量的激光的光输出并监视输出的光谱波长,光谱宽度或光谱形状。 控制器(19)连接到所述分析器并基于所述光谱信息产生控制信号。 控制信号导致例如为了产生所述短稳定脉冲而调节影响所述激光器的操作的一个或多个参数,例如RF驱动信号的频率或功率,直流偏置电平,腔体长度。

    Division multiplexing and demultiplexing means lightwave communication
system comprising optical time
    14.
    发明授权
    Division multiplexing and demultiplexing means lightwave communication system comprising optical time 失效
    分路复用和解复用是指包括光时间的光波通信系统

    公开(公告)号:US4991975A

    公开(公告)日:1991-02-12

    申请号:US275454

    申请日:1988-11-22

    IPC分类号: H04J14/08 H04L7/033

    CPC分类号: H04J14/08 H04L7/0337

    摘要: Disclosed is a time division multiplexed optical communication system that is capable of operation at relatively high bit rates and that is relatively stable and immune to crosstalk and noise. The system comprises receiver means wherein the timing signal for demultiplexing is derived from the fully multiplexed optical pulse stream by means that comprise a narrow band receiver and timing means that produce a lower-frequency timing signal from the output of the narrow band receiver. The timing signal is used to drive one or more optical switches. In one embodiment of the invention the receiver means have a binary-tree architecture and the timing signals are substantially sinusoidal. In another embodiment the receiver means have a linear-bus architecture and the timing signals are pulse-like.

    摘要翻译: 公开了一种时分复用光通信系统,其能够以相对高的比特率操作并且相对稳定并且不受串扰和噪声的影响。 该系统包括接收机装置,其中用于解复用的定时信号通过包括窄带接收机和从窄带接收机的输出产生较低频定时信号的定时装置从全复用光脉冲流导出。 定时信号用于驱动一个或多个光开关。 在本发明的一个实施例中,接收机装置具有二进制树结构,并且定时信号基本上是正弦的。 在另一个实施例中,接收器装置具有线性总线架构,并且定时信号是类似脉冲的。