Minimum_Specs_DP-QPSK_Coherent_Mixer.pdf

12 Feb 2015

SPECIFICATION- DP-QPSK Coherent Receiver

The following are the requirements for a dual polarization quadrature phase shift keyed (DP-QPSK) optical coherent receiver.

Input ports:

Number of input ports: 2, designed as signal input and local oscillator

(LO) input.

Fiber type: polarization maintaining (pm)

Cable type: 900 micron loose tube, preferably blue

Connector type: FC/APC with narrow key aligned to slow axis

Pigtail length: 1 meter

Input polarization: The device shall function with local oscillator light polarized and aligned to the slow axis.

Polarization of signal input will vary.

Output ports:

Number of output ports: 8.

Function of output ports: I1x provides S+L for x polarization

I2x provides S-L for x polarization

Q1x provides S+jL for x polarization

Q2x provides S-jL for x polarization

I1y provides S+L for y polarization

I2y provides S-L for y polarization

Q1y provides S+jL for y polarization

Q2y provides S-jL for y polarization

Fiber type: SMF-28

Cable type: 900 micron loose tube

Connector type: SC/APC

Pigtail length: 1 meter

Wavelength range: 1528 to 1565 nm

Phase difference between I1x and Q1x, I2x and Q2x

I1y and Q1y, I2y and Q2y: 90 +/- 10 degrees

Insertion loss: S or L to all ports < 12 dB

Insertion loss differences: < 0.7 dB between S to I1x and S to I2x loss

<0.7 dB between S to Q1x and S to Q2x loss

< 0.7 dB between L to I1x and L to I2x loss

< 0.7 dB between L to Q1x and L to Q2x loss

< 0.7 dB between S to I1y and S to I2y loss

<0.7 dB between S to Q1y and S to Q2y loss

< 0.7 dB between L to I1y and L to I2y loss

< 0.7 dB between L to Q1y and L to Q2y loss

< 1 dB between all other combinations of paths

Optical Path Difference < 1 ps among the paths from S to all outputs.

< 1 ps among the paths from L to all outputs.

Polarization extinction: > 18 dB

Optical Return Loss >27 dB

Power handling: maximum power shall be at least 300 mW

Operating temperature for specs: 0 to 65 degrees C

Storage temperature: -40 to 85 degrees C

Size: 50 x 35 x 15 mm