The Mach-Zehnder Modulator structure is suited not only for standard on-off-keying modulation, but also for enhanced new modulation schemes like Duobinary or Differential Phase Shift Keying (DPSK). The nested IQ Modulator structure is capable for the enhanced DQPSK modulation format.
A 40 Gbit Modulator module has been developed with this component. Either GPPO or V-Connectors are used.
Typical bandwidth of such a module is 40 GHz, the necessary driving voltage is Vpp = 2.5 V with an insertion loss of 8 dB.
Lowest drive voltage achieved for a 40 Gbit Modulator was Vpp = 1.5 V.
A variety of different modulators has been developed:
- MZ Modulator for OOK
- MZ Modulator for DPSK, Duobinary
- IQ-Modulator for DQPSK
- Phase Modulators
All devices are completely fabricated at HHI using our InP processing line. The electro-optic RF-Response can be measured up to 67 GHz on chip and module level.