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90°光学混合器90deg Optical Hybrid

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90°光学混合器90deg Optical Hybrid

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  捷讯光电的6端口90°光学混频器,由信号光与本振光可相干混频产生4个复数域的解调信号,可由两对平衡探测器接收,并经DSP处理后恢复原始信号。可用于光学相干技术的接收,例如QPSK接收器。
  
  90°光学混频器在相干接收器中的应用可见下图:
  
90°光学混合器90deg Optical Hybrid
  
  利用自由空间微光学技术,捷讯光电的90°光学混频器适用于PSK信号解调,如BPSK 或QPSK信号解调。如上图所示,此设备可输入两路光信号(S & L),并产生4路输出光信号:S+L, S-L, S+jL, S-jL。当两对平衡接收机检测到这些信号时,这些输入信号中的振幅和相对相位信息可以通过差分检测与数字信号处理的方式提取出来。
未找到相应参数组,请于后台属性模板中添加
  90°光学混频器的主要特性及优点
  ●  纯被动式(无需外部电源)
  ●  体积小
  ●  基于自由空间微光学设计
  ●  有分别处理偏振态的版本
  90°光学混频器的应用
  ●  光学相干检测的关键组件
  ●  QPSK 解调

Parameter Definition

Example

Wavelength Range (nm) is defined as spectral range over which the optical hybrid can operate.

1527.99 ~ 1563.05 nm

Phase Difference (deg): In each of the four output ports (M1, M2, M3 and M4), the interference between S and L takes place. If the phases of S and L at the four outputs are, 
fSM1, fSM2, fSM3, fSM4, fIM1, fIM2, fIM3, fIM4
then, the phase difference between port 1 and port 3 is defined as:
(fSM1 - fIM1) - (fSM3 - fIM3)
The phase difference between port 2 and port 4 is defined as:
(fSM2 - fIM2) - (fSM4 - fIM4)

90±5 deg

Input Port: There are two input ports, which are S and L.

-

Output Port: There are 4 output ports, which are M1, M2, M3 and M4.

-

Excess Insertion Loss (dB) is defined as the actual insertion loss subtracted by 6 dB, which is the ideal intrinsic loss from any input to any output.

8.0 dB

Insertion Loss Difference (dB): It is the insertion loss difference between two specified optical paths.

0.5 dB

Optical Return Loss (dB) is the ratio between the input power and the reflected power over all polarization states at each port , RL = -10×log10(Pr/Pin).

40 dB

Operating Temperature (°C) is the ambient temperature range over which the device's performance spec can be met.

15 to 35 °C

Storage Temperature (°C) is the ambient temperature range over which the device can be stored without affecting its intended application afterwards.

-40 to 85 °C

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