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GRIN Lens Coupled Top-Illuminated Highly Linear InGaAs Photodiodes (2008)

Abhay Joshi, Shubhashish Datta, and Don Becker
Discovery Semiconductors, Inc.
119 Silvia Street
Ewing, New Jersey, 08628, USA


We report a graded index (GRIN) lens-coupled highly linear InGaAs photodiode with a third-order harmonic output intercept point of 54 dBm and an estimated third output intercept point of 49.2 dBm. Optical beam shaping through GRIN lens coupling enhances the third-order intercept by 8 dB as compared to single-mode fiber coupled photodiodes.

*IEEE Photonics Technology Letters, Vol. 20, No. 17, September 1, 2008.

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