this optical modulator is a Ti:LiNbO3 Single or Dual Drive Mach-Zehnder modulator with modulation speed of up to 43 GB/s. this optical modulator integrates a monitor PD chip and coupler function for automatic bias control (ABC) for the compensation system of DC-drift and other phenomena.

40Gbps Intensity Modulator, Fujitsu FTM7937EZ, Lithium Niobate Fiber Modulator with the Features of

Low Drive Voltage, RF VπVoltage 3.6V@40Gps Single Drive, 1.8V@40Gbps Dual Drive, Typ.
40Gbps Mach-Zehnder Modulator Using Ti-diffused LiNbO3 Waveguide Technology
Separated DC Bias Port
Low Insertion Loss, ≤10dB Typ.
Applications – NRZ, DPSK, BPSK, OBD 40Gbps  Optical Transmission System
Integrated Monitor Photodiode for Auto Bias Control