A 4×50Gb/s NRZ 1.5pJ/b Co-Packaged and Fiber-Terminated 4-Channel Optical RX

This paper presents a 4-channel co-packaged optical RX that integrates a photo diode array, fiber termination and a transimpedance amplifier front end (TIA-FE) IC on the same package as an RX data-path IC. To achieve high sensitivity, the TIA-FE employs bandwidth extension and in-band group delay co...

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Bibliographic Details
Main Authors: Krishnamurthy, Sashank, Mondal, Susnata, Qiu, Junyi, Kennedy, Joe, Bose, Soumya, Acikalin, Tolga, Yamada, Shuhei, Jaussi, James, Mansuri, Mozhgan
Format: Conference Proceeding
Language:English
Subjects:
co-packaged optics
FFE
I/O link
Integrated optics
Optical fiber amplifiers
Optical fiber communication
Optical fiber sensors
Optical RX
Sensitivity
Surface emitting lasers
TIA
vertical-cavity surface-emitting laser (VCSEL)
Very large scale integration
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Summary:This paper presents a 4-channel co-packaged optical RX that integrates a photo diode array, fiber termination and a transimpedance amplifier front end (TIA-FE) IC on the same package as an RX data-path IC. To achieve high sensitivity, the TIA-FE employs bandwidth extension and in-band group delay compensation techniques that are co-optimized with a 1/4-rate 2-tap feed-forward equalizer (FFE) in the RX data-path. A StrongArm latch that improves noise variance by 3.5x for iso-power is introduced. Modulated by its VCSEL-based optical TX counterpart, the optical RX demonstrates 4×50Gb/s NRZ at 1.5pJ/b with BER
ISSN:2158-9682
DOI:10.1109/VLSITechnologyandCir46783.2024.10631327