Features and Benefits of DQPSK Demodulator: Athermal design C+L band coverage by a single device Low temperature-dependent frequency shift (TDFS) Low polarization-dependent frequency shift (PDFS) Wide bandwidth Low insertion loss & PDL High power handling Passive, semi-tunable and fully tunable operation Suitable for both RZ and NRZ modulation format Telcordia GR-1221 qualified
	Applications of DQPSK Demodulator: 5 or 20 Gb/s DQPSK Signal Reception Data Rate Optimization Extend Transmission Distances
	Standard Specifications of DQPSK Demodulator: Parameter Unit Specification Wavelength Range (C-Band) nm 1527 to 1567 Wavelength Range (L-Band) nm 1567 to 1607 Free Spectral Range1 (FSR, ~1/2 of the nominal data rate, a few typical values are given) GHz 10.7, 21.5, 28 or 32.5 FSR Error2 % < 1 Insertion Loss2 (including all connectors) dB 5.7 Typical; 6.0 Max Extinction Ratio2 dB > 18 PMD2 ps < 0.1 Return Loss dB > 40 PDL2 dB < 0.2 PDFS2 deg < 3 Optical Path Delay2 (Skew, among Input -> I1, I2, Q1, Q2) ps < 1.0 Tuning Range FSR > 1.5 Tuning Time Constant3 sec < 1.0 Power Consumption W 1.0 Typical; 2.0 Max Tuning Voltage V 0 to 5 Maximum Input Optical Power mW 300 Operating Temperature °C -5 to 65 Storage Temperature °C -40 to 85 Dimension (L x W x H)4 mm 50x41x11 Connector Type - TBD Fiber Pigtail Type - SMF-28 with 900 µm loose tube Fiber pigtail length m 1.0 ± 0.1 Notes: 1. Values listed are typical examples, customer can specify. 2. Over the stated spectral and operating temperature ranges and all polarization states. 3. Defined as the time required to reach half-way from the starting and ending points. 4. Not including five collimator sleeves extending from one longer side by 21 mm.