The Oclaro DQPSK(Differential Quadrature Reference Phase Shift Keying) modulator design is based on a dual parallel structure of two Mach-Zehnder modulators embedded in a Mach-Zehnder super-structure. Each internal modulator is designed to support 22 Gb/s signals. An integrated polarizer enables high extinction ratios as required for the DQPSK modulation format. High bandwidth photodiode is provided for automatic bias control.
Typical Application
Quadrature modulation (QPSK or 4QAM)
Single side-band suppressed carrier (SSB-SC) transmission
Technical Specifications
| Model Number | 792000850 |
| Substrate Material | Lithium Niobate (LiNbO3) |
| Crystal Orientation | X-Cut, Y-Propagating |
| Waveguide Process | Titanium Indiffused (TI) |
| Integrated Photodiode | No |
| Optical Specifications | |
| Operating Wavelength Range | C-band |
| Insertion Loss | 5.5 dB typ., 7.0 dB max. |
| On/Off Extinction Ratio | 22 dB min. @ DC |
| Optical Return Loss | 30 dB min. |
| Polarization Extinction Ratio | 22 dB min |
| Electrical Specifications | |
| RF Port | |
| Drive Voltage Vpi | 7.0 V typ., 7.5 V max. @ 22 Gb/s DPSK (2 Vπ) |
| Electro-optic Bandwidth (-3dB) | 20 GHz min., 23 GHz typ |
| RF Return Loss | 8 dB min., 10 dB typ. @ 17 GHz to 30 GHz |
| RF Input Power | 100 mW absolute max. @ CW |
| Chirp, Alpha Parameter | Zero Chirp, +/-0.2 Maximum |
| Bias Port | |
| Drive Voltage Vpi | 7 V typ., 8 V max., @ 1 kHz |
| Electro-optic Bandwidth (-3dB) | 200MHz minimum |
| Input Impedance | 1 mΩ min. @ DC |
| Environment / User Interface | |
| Input Fiber | PANDA – 900 micron loose tube |
| Output Fiber | PANDA – 900 micron loose tube |
| Input Connector | FC/APC (PM) |
| Output Connector | FC/APC (PM) |
| RF Connector | SMPM MALE (2) |
| Bias Connector | 9 dual solder gullwing pins |
| Photodiode Connector | n/a |
| Dimensions | 93mm(L) x 14mm(W) x 7mm (H) |
| Operating Temperature Range | -5˚C to +75˚C |
| Storage Temperature Range | -40˚C to +85˚C |
