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Enabling High-performance Coherent Networking


High Performance and Volume Manufacturability

Leveraging a monolithically integrated indium phosphide photonic integrated circuit (PIC), Infinera’s 64 GBaud transmit-receive optical sub-assembly (TROSA) sets a new industry record in the high-density integration of discrete functions into a single submodule, including PIC, radio frequency application-specific integrated circuit (ASIC), and thermoelectric cooling.

Infinera’s ICTR64 TROSA is designed to easily integrate into digital coherent optics (DCO) transceiver or transponder designs, as well as very high-density coherent line card designs. The assembly consists of a hermetic package containing all the coherent Tx and Rx optics with a digital control interface. The device has built-in memory and controller and can be tuned across the full C-band, with flexible grid support. The optical performance is well suited for metro/regional networks in colorless applications.

The ICTR64 has been granted several industry awards including:

Infinera TROSA and awards


  • High-density integration of discrete functions into a single submodule, including PIC, radio frequency ASIC, and thermoelectric cooling
  • High performance with 64 Gbaud, 0 dBm, low out-of-band noise for successful deployment over colorless ROADM architectures, high transmit OSNR, and high receive sensitivity


  • Easy integration: deploy quickly into 400G DCO transceivers or transponders. Suitable for QSFP-DD, OSFP, or CFP2-DCO as well as high-density coherent line card designs
  • High efficiency: low power consumption, compact footprint, and high reliability
  • High-volume manufacturability: for deployment in both coherent pluggables and embedded optical engines

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