公开(公告)号：US06842587B1

公开(公告)日：2005-01-11

申请号：US09538224

申请日：2000-03-30

申请人： Douglas D. McGhan ,  Alen Chan

发明人： Douglas D. McGhan ,  Alen Chan

IPC分类号： H04B10/155 ,  H04B10/04

CPC分类号： H04B10/503

摘要： A semiconductor optical amplifier (SOA) is placed in the optical path between the tunable laser and the external modulator on a DWDM optical transmitter. The modulator transfer function is measured using low-level amplified spontaneous emission light output from the SOA in order to find the modulator bias corresponding to minimum transmission. The external modulator is biased to the point of minimum transmission to reduce the transmitter output power during laser turn-on. The SOA bias is also turned off to provide further attenuation as the laser is turned on. Similarly, to avoid emitting off-wavelength light during wavelength changes, the transmitter output is attenuated with a combination of low SOA bias current and biasing the modulator to its minimum transmission point. In both cases, the laser wavelength is allowed to stabilize without interfering with adjacent DWDM channels.

摘要翻译： 半导体光放大器（SOA）放置在DWDM光发射机上的可调谐激光器和外部调制器之间的光路中。 使用来自SOA的低电平放大自发发射光来测量调制器传递函数，以便找到对应于最小传输的调制器偏置。 外部调制器偏置到最小传输点，以减少激光打开时的发射机输出功率。 当激光打开时，SOA偏压也被关闭以提供进一步的衰减。 类似地，为了避免在波长变化期间发射非波长光，发射机输出通过低SOA偏置电流的组合衰减并将调制器偏置到其最小传输点。 在这两种情况下，允许激光波长稳定而不干扰相邻的DWDM通道。

公开(公告)号：US06603433B1

公开(公告)日：2003-08-05

申请号：US10084954

申请日：2002-03-01

申请人： Xu Richard Max ,  Jacky Weng ,  Alen Chan ,  Darren Peng ,  Wei Ye ,  Tony Wu

发明人： Xu Richard Max ,  Jacky Weng ,  Alen Chan ,  Darren Peng ,  Wei Ye ,  Tony Wu

IPC分类号： H01Q124

CPC分类号： H01Q11/08 ,  H01Q1/242

摘要： A positioning structure of an inner and an outer insulation sleeve member for an antenna, the sleeve members are an outer insulation sleeve and an inner insulation connecting rod insertion connecting with each other to form the main housing of the antenna, wherein, the inner connecting rod has thereon an upper and a lower protruding rib in corresponding respectively to an upper and a lower inner annular recess provided on the outer sleeve. The lower inner annular recess and the lower protruding rib had better be both in a truncated conical shape flared downwardly to form an abutting shoulder to help guiding for insertion connecting and to prevent slipping off of them by an axial pulling force. The inner connecting rod has thereon notches corresponding in position to the pending tongs on the top of the outer sleeve; and the inner and the outer sleeve members can synchronically be positioned in the peripheral direction.

摘要翻译： 一种用于天线的内绝缘套筒构件和外绝缘套筒构件的定位结构，套筒构件是外绝缘套筒和内绝缘连接杆插入件，彼此连接以形成天线的主壳体，其中，内连杆 在其上具有分别对应于设置在外套筒上的上和下内部环形凹部的上部和下部突出肋。 下部内部环形凹部和下部突出肋较好地向下扩展成截锥形，以形成邻接的肩部，以帮助引导插入连接，并且通过轴向拉力防止它们滑脱。 内连杆在其上具有对应于位于外套筒顶部上的悬挂钳的位置的缺口; 并且内套筒构件和外套筒构件可以沿圆周方向同步地定位。