-
公开(公告)号：US08379295B2
公开(公告)日：2013-02-19
申请号：US12687570
申请日：2010-01-14
申请人： Xueyan Zheng , Kevin McCallion
发明人： Xueyan Zheng , Kevin McCallion
CPC分类号： H04L27/223 , G02F2/00 , H04B10/677 , H04L27/2071
摘要： A phase-shift keyed signal demodulator is disclosed including a filter positioned to receive an input beam, a first photodiode positioned to receive light reflected from the filter, and a second photodiode positioned to receive light transmitted through the filter. A difference between outputs of the first and second photodiodes is interpreted to determine a data value encoded in the input beam. In another embodiment N filters receive inputs from a splitter and include transmission functions offset from one another. N pairs of photo diodes receive the transmitted and reflected beams from each filter and a decoder converts the outputs of the pairs of photodiodes to one or more data symbols.
摘要翻译： 公开了一种相移键控信号解调器，其包括定位成接收输入光束的滤光器，定位成接收从滤光器反射的光的第一光电二极管和定位成接收透过滤光器的光的第二光电二极管。 解释第一和第二光电二极管的输出之间的差异，以确定在输入光束中编码的数据值。 在另一个实施例中，N个滤波器从分离器接收输入并且包括彼此偏移的传输函数。 N对光电二极管接收来自每个滤波器的发送和反射光束，并且解码器将该对光电二极管的输出转换为一个或多个数据符号。
-
公开(公告)号：US20120269523A1
公开(公告)日：2012-10-25
申请号：US13534276
申请日：2012-06-27
申请人： Kevin McCallion , Xueyan Zheng
发明人： Kevin McCallion , Xueyan Zheng
IPC分类号： H04B10/06
CPC分类号： H04L27/223 , G02F2/00 , H04B10/677 , H04L27/2071
摘要： A phase-shift keyed signal demodulator and method for demodulating is disclosed. An example demodulator includes N filters that receive inputs from a splitter and include transmission functions offset from one another. N pairs of photodiodes receive the transmitted and reflected beams from each filter and a decoder converts the outputs of the pairs of photodiodes to one or more data symbols.
摘要翻译： 公开了一种用于解调的相移键控信号解调器和方法。 示例解调器包括N个滤波器，其接收来自分路器的输入并且包括彼此偏移的传输函数。 N对光电二极管接收来自每个滤波器的发送和反射光束，并且解码器将该对光电二极管的输出转换成一个或多个数据符号。
-
公开(公告)号：US07991291B2
公开(公告)日：2011-08-02
申请号：US12028675
申请日：2008-02-08
申请人： Yasuhiro Matsui , Kevin McCallion
发明人： Yasuhiro Matsui , Kevin McCallion
CPC分类号： H04J14/0226 , H04B10/272 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0282
摘要： Low-cost FP lasers can be implemented in the upstream links of a WDM PON system by configuring them for single-mode operation. In a typical embodiment, an FP laser at a subscriber unit is injection seeded with CW seed light from a DFB laser or an ASE source at a central office to enable single-mode operation of the FP laser. The FP laser is directly modulated and the resulting optical data signal is transmitted upstream to the central office. At the central office, an optical spectrum reshaper/bandpass optical filter is positioned in front of an optical receiver to enhance the extinction ratio of the optical data signal and generate a vestigial sideband. A wavelength locker can also be implemented at the central office to stabilize the wavelength of the master DFB laser and the injection-seeded FP laser.
摘要翻译： 低成本FP激光器可以通过将其配置为单模操作在WDM PON系统的上游链路中实现。 在典型的实施例中，在用户单元处的FP激光器用来自DFB激光器的CW种子光或在中心局的ASE光源注入，以实现FP激光器的单模操作。 FP激光器被直接调制，所得到的光学数据信号在上游传输到中心局。 在中央办公室，光谱整形/带通滤光器位于光接收器的前面，以增强光数据信号的消光比并产生残留边带。 还可以在中心局实现波长锁定器，以稳定主DFB激光器和注射种子FP激光器的波长。
-
公开(公告)号：US20110170171A1
公开(公告)日：2011-07-14
申请号：US12687570
申请日：2010-01-14
申请人： Kevin McCallion , Xueyan Zheng
发明人： Kevin McCallion , Xueyan Zheng
IPC分类号： G02F2/00
CPC分类号： H04L27/223 , G02F2/00 , H04B10/677 , H04L27/2071
摘要： A phase-shift keyed signal demodulator is disclosed including a filter positioned to receive an input beam, a first photodiode positioned to receive light reflected from the filter, and a second photodiode positioned to receive light transmitted through the filter. A difference between outputs of the first and second photodiodes is interpreted to determine a data value encoded in the input beam. In another embodiment N filters receive inputs from a splitter and include transmission functions offset from one another. N pairs of photo diodes receive the transmitted and reflected beams from each filter and a decoder converts the outputs of the pairs of photodiodes to one or more data symbols.
摘要翻译： 公开了一种相移键控信号解调器，其包括定位成接收输入光束的滤光器，定位成接收从滤光器反射的光的第一光电二极管和定位成接收透过滤光器的光的第二光电二极管。 解释第一和第二光电二极管的输出之间的差异，以确定在输入光束中编码的数据值。 在另一个实施例中，N个滤波器从分离器接收输入并且包括彼此偏移的传输函数。 N对光电二极管接收来自每个滤波器的发送和反射光束，并且解码器将该对光电二极管的输出转换为一个或多个数据符号。
-
35.发明申请公开(公告)号：US20090208225A1
公开(公告)日：2009-08-20
申请号：US12034514
申请日：2008-02-20
CPC分类号： H04B10/40 , G02F1/0121 , G02F1/0136
摘要： A small-scale VOA system includes a polarization rotator, a voltage multiplier circuit, and at least one transistor. The polarization rotator can be positioned within a TOSA along the emission axis of a corresponding optical signal source in addition to one or more polarizers. A microcontroller provides a first low voltage control signal to a voltage multiplier to generate a large voltage DC signal which is provided to the transistor. The transistor modulates the large voltage signal with a second control signal from the microcontroller to generate a large voltage AC signal for driving the polarization rotator. The polarization rotation of the polarization rotator can be altered depending on the applied large-voltage AC signal. As a result, the polarization rotator and one or more polarizers can variably attenuate signals emitted by the optical signal source or act as a shutter.
摘要翻译： 小规模VOA系统包括偏振旋转器，电压倍增器电路和至少一个晶体管。 除了一个或多个偏振器之外，偏振旋转器可以沿着对应的光信号源的发射轴定位在TOSA内。 微控制器向电压倍增器提供第一低电压控制信号，以产生提供给晶体管的大电压DC信号。 晶体管利用来自微控制器的第二控制信号来调制大电压信号，以产生用于驱动偏振旋转器的大电压AC信号。 可以根据施加的大电压AC信号来改变偏振旋转器的偏振旋转。 结果，偏振旋转器和一个或多个偏振器可以可变地衰减由光信号源发射的信号或用作快门。
-
36.发明授权公开(公告)号：US07558488B2
公开(公告)日：2009-07-07
申请号：US11093461
申请日：2005-03-30
IPC分类号： H04B10/06
CPC分类号： H04B10/504
摘要： A fiber optic system comprising a modulated signal source coupled to a spectral filtering element characterized in that the bandwidth of the optical spectrum of the signal after the spectral filtering element is reduced relative to the optical bandwidth of the spectrum before the filtering element.
摘要翻译： 一种光纤系统，包括耦合到频谱滤波元件的调制信号源，其特征在于频谱滤波元件之后的信号的光谱的带宽相对于滤波元件之前的频谱的光带宽减小。
-
-
-
-
-
搜索结果
36 条记录 (耗时 0.023 秒)
