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High Power-Handling Linear Integrated Coherent Photoreceivers for RF Photonics (2013)


Abhay Joshi, Shubhashish Datta, Jim Rue, Sruti Rajagopalan and Shaun Lemke
Discovery Semiconductors, Inc.
119 Silvia Street
Ewing, NJ 08628, USA
Tel: 609-434-1311, Fax: 609-434-1317

ABSTRACT

We report integrated coherent optical receivers designed specifically for RF Photonics applications. These receivers may be implemented in either single-polarization or dual-polarization (DP) systems which utilize I/Q (in-phase, quadrature) phase modulation. The integrated receivers incorporate a monolithic 90 degree optical hybrid followed by eight high power-handling InGaAs photodiodes. Linear operation to +27 dBm of total optical input power, 20 mA photocurrent per diode, output third-order intercept (OIP3) > 40 dBm, third-order harmonic distortion < -100 dBc, and RF bandwidths > 4 GHz is presented. Such photoreceiver power-handling and linearity is required to optimize the photonic system spurious free dynamic range (SFDR), noise figure (NF) and link gain.

* Proc. of SPIE Vol. 8720 872011-1

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