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公开(公告)号：US06856767B2
公开(公告)日：2005-02-15
申请号：US09837855
申请日：2001-04-18
申请人： Mohammad Laham , Raj Acharya , Roman Antosik , Jayantha Das , Bharat Dave , Chinnabbu Ekambaram , Khem Gandhi , Frank Hujber , David Lowe , Frederick Renner , Jiten Sarathy , Ronald Simprini , Boris Stefanov , Tan Thai , Ravi Vora
发明人： Mohammad Laham , Raj Acharya , Roman Antosik , Jayantha Das , Bharat Dave , Chinnabbu Ekambaram , Khem Gandhi , Frank Hujber , David Lowe , Frederick Renner , Jiten Sarathy , Ronald Simprini , Boris Stefanov , Tan Thai , Ravi Vora
CPC分类号： H04Q11/0005 , H04B10/077 , H04B10/07955 , H04J14/0227 , H04J14/0297 , H04Q2011/0043 , H04Q2011/0083
摘要： The present invention provides an optical signal quality selection system for optimizing the quality of information transmission. The system splits an incoming optical signal into two equal signals. The split signals are evaluated in optical performance monitors, transmitting an electrical output message to a signal selector relating to the quality of the respective signal. A second electrical message is sent from the optical performance generator to an alarm indicator signal generator, which sends an optical signal to the signal selector to drop the one of the split signals and transmit the non-dropped split signal. An unequipped optical signal from an optical idle signal generator is triggered if no active optical signal is being transmitted.
摘要翻译： 本发明提供一种用于优化信息传输质量的光信号质量选择系统。 系统将输入的光信号分成两个相等的信号。 在光学性能监视器中评估分离信号，将电输出消息发送到与各个信号的质量有关的信号选择器。 从光学性能发生器发送第二个电子消息到报警指示符信号发生器，其向信号选择器发送光信号以丢弃分离信号之一并发送未丢弃的分离信号。 如果没有传输有效的光信号，则触发来自光空闲信号发生器的未装备的光信号。
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公开(公告)号：US06724484B2
公开(公告)日：2004-04-20
申请号：US10195699
申请日：2002-07-15
申请人： Julio Martinez , Kwang Kim , Olga Nedzhvetskaya , Doruk Engin , Jiten Sarathy , Roman Antosik , Bharat Dave , Michael Evans , David Lidsky , Ronald Simprini , Boris Stefanov , Tan Thai
发明人： Julio Martinez , Kwang Kim , Olga Nedzhvetskaya , Doruk Engin , Jiten Sarathy , Roman Antosik , Bharat Dave , Michael Evans , David Lidsky , Ronald Simprini , Boris Stefanov , Tan Thai
IPC分类号： G01B902
CPC分类号： H04B10/299 , H04L7/0075
摘要： A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.
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公开(公告)号：US06624924B2
公开(公告)日：2003-09-23
申请号：US10195700
申请日：2002-07-15
申请人： Bharat Dave , Doruk Engin , Kwang Kim , Mohammad Laham , Julio Martinez , Olga Nedzhvetskaya , Jithamithra Sarathy , Ronald Simprini , Boris Stefanov , Tan Buu Thai
发明人： Bharat Dave , Doruk Engin , Kwang Kim , Mohammad Laham , Julio Martinez , Olga Nedzhvetskaya , Jithamithra Sarathy , Ronald Simprini , Boris Stefanov , Tan Buu Thai
IPC分类号： G02F135
CPC分类号： H04B10/299 , H04L7/0075
摘要： A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.
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公开(公告)号：US06570697B2
公开(公告)日：2003-05-27
申请号：US09848968
申请日：2001-05-04
申请人： Julio Martinez , Kwang Kim , Olga Nedzhvetskaya , Doruk Engin , Jiten Sarathy , Roman Antosik , Bharat Dave , Michael Evans , David Lidsky , Ronald Simprini , Boris Stefanov , Tan Thai
发明人： Julio Martinez , Kwang Kim , Olga Nedzhvetskaya , Doruk Engin , Jiten Sarathy , Roman Antosik , Bharat Dave , Michael Evans , David Lidsky , Ronald Simprini , Boris Stefanov , Tan Thai
IPC分类号： G02B2600
CPC分类号： H04B10/299 , H04L7/0075
摘要： A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.
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公开(公告)号：US3372326A
公开(公告)日：1968-03-05
申请号：US45208365
申请日：1965-04-30
申请人： BORIS STEFANOV
发明人： BORIS STEFANOV
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