公开(公告)号：US5345332A

公开(公告)日：1994-09-06

申请号：US56098

申请日：1993-05-03

申请人： Valeria L. daSilva ,  Lars E. Eskildsen ,  Evan L. Goldstein ,  Yaron Silberberg

发明人： Valeria L. daSilva ,  Lars E. Eskildsen ,  Evan L. Goldstein ,  Yaron Silberberg

IPC分类号： H01S3/067 ,  H04B10/27 ,  H04B10/275 ,  H04B10/291 ,  H04B10/293 ,  H01S3/30

CPC分类号： H04B10/27 ,  H01S3/06754 ,  H04B10/275 ,  H04B10/2912 ,  H04B10/2935 ,  H01S2301/04

摘要： In a multiwavelength lightwave communications system channel-by-channel power regulation is achieved with a cascade of inhomogeneously broadened saturated fiber amplifiers spaced along the optical fiber transmission path. In the described embodiment, inhomogeneous broadening is achieved by immersing each of the erbiumdoped fiber amplifiers in the cascade in a bath of liquid nitrogen, thereby cooling each amplifier to approximately 77 K.

摘要翻译： 在多波长光波通信系统中，通过沿着光纤传输路径间隔开的级联的不均匀加宽的饱和光纤放大器实现逐通道功率调节。 在所描述的实施例中，通过将级联中的每个掺铒光纤放大器浸入液氮浴中，从而将每个放大器冷却至约77K来实现不均匀的加宽。

公开(公告)号：US5392154A

公开(公告)日：1995-02-21

申请号：US220088

申请日：1994-03-30

申请人： Gee-Kung Chang ,  Lars E. Eskildsen ,  Evan L. Goldstein ,  Muhammed Z. Iqbal ,  Chinlon Lin

发明人： Gee-Kung Chang ,  Lars E. Eskildsen ,  Evan L. Goldstein ,  Muhammed Z. Iqbal ,  Chinlon Lin

IPC分类号： H01S3/067 ,  H01S3/16 ,  H04B10/17 ,  H04B10/213 ,  H04J14/02

CPC分类号： H04J14/0221 ,  H01S3/06754 ,  H04B10/2935 ,  H01S3/1608 ,  H04B2210/258

摘要： In a multiwavelength lightwave communications system automatic self-power regulation on a channel-by-channel basis is achieved with a cascade of multiwavelength amplifier modules (200), wherein each multiwavelength amplifier module in the cascade includes a plurality of pump-shared parallel fiber amplifiers (208) operated in gain-saturation and connected between an optical demultiplexer (203) and multiplexer (209). An optional first gain stage (202) improves performance with higher optical signal-to-noise ratio. By self-regulating the power in each channel, the communications system is scalable, allowing the system to grow without deleterious effects due to power spread.

摘要翻译： 在多波长光波通信系统中，通过级联的多波长放大器模块（200）实现逐个信道的自动自我功率调节，其中级联中的每个多波长放大器模块包括多个泵共享并行光纤放大器 （208）以增益饱和操作并连接在光解复用器（203）和多路复用器（209）之间。 可选的第一增益级（202）利用较高的光信噪比提高了性能。 通过自我调节每个通道的功率，通信系统是可扩展的，允许系统由于功率传播而增长而没有有害影响。

公开(公告)号：US5477368A

公开(公告)日：1995-12-19

申请号：US366139

申请日：1994-12-29

申请人： Lars E. Eskildsen ,  Per B. Hansen

发明人： Lars E. Eskildsen ,  Per B. Hansen

IPC分类号： G02F1/01 ,  G02F1/35 ,  H01S3/06 ,  H01S3/10 ,  H04B10/02 ,  H04B10/18 ,  H04B10/04 ,  H04B10/17

CPC分类号： H04B10/2537 ,  H01S2301/02 ,  H01S2301/03 ,  H01S3/06754

摘要： Stimulated Brillouin scattering has been effectively suppressed and the effect of residual amplitude modulation has been mitigated in a dithered optical transmitter by injecting the dithered optical signal into an optical device, such as a highly saturated amplifier, whose small-signal intensity response at the dither frequency dampens the residual amplitude modulation thereby decreasing the eye closure (alternatively, increasing the eye pattern opening). The optical device (e.g., the highly saturated amplifier) exhibits a low frequency cutoff (-3 dB) at a frequency greater than or equal to the inverse of the round trip time for a fiber span with the effective optical transmission length into which the optical signal power is launched. The dither rate is generally in the neighborhood of or below the low cutoff frequency.

摘要翻译： 已经有效地抑制了激励的布里渊散射，并且通过将抖动的光信号注入到诸如高饱和放大器的光学装置中，在抖动光发射机中已经减轻了剩余幅度调制的影响，其中抖动频率的小信号强度响应 抑制残余幅度调制，从而减少眼睛闭合（或者增加眼图开口）。 光学器件（例如，高饱和放大器）在大于或等于具有有效光传输长度的光纤跨度的往返时间的倒数的频率处表现出低频截止（-3dB），其中光学 信号功率启动。 抖动率通常在低截止频率附近或以下。