622-Mbps APD/FET optical front-end receiver: design, technology, and performance

Subodh Johri; K. M. K. Srivatsa; J. P. Pachauri; L. P. Agarwal; Aji Baby; Harshad S. Kothari; Babu Ram Singh

doi:10.1117/12.347952

28 April 1999 622-Mbps APD/FET optical front-end receiver: design, technology, and performance

Subodh Johri, K. M. K. Srivatsa, J. P. Pachauri, L. P. Agarwal, Aji Baby, Harshad S. Kothari, Babu Ram Singh

Proceedings Volume 3666, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '98; (1999) https://doi.org/10.1117/12.347952
Event: International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '98, 1998, New Delhi, India

Abstract

APD/FET optical receivers are preferred choice over PIN/FET for high data rate, high sensitivity applications mainly because of APDs combine detection of optical signal with internal amplification of photo current. However, there are number of critical issues such as device and preamplifier design, circuitary required to keep the Avalanche photodetector (APD) biased at optimum gain and temperature compensation of bias being applied to it etc., have to be addressed to realize an optical receiver with desired performance. This paper deals with the design and fabrication of 622 Mbps optical receiver front-end using Separate Absorption Graded Multiplication (SAGM) APD for photodetection and combination of MESFET and BJT for transimpedance amplifier design. AIMSPICE has been extensively used to simulate appropriate biasing of the active and passive devices taking into account various parasitics like miller capacitances, lead inductance etc. in order to optimize DC and AC performance of the circuit. Cr/Cu/Au thin film technology and solderable surface mount devices (SMD) have been used for its fabrication. Also included are the optical receiver performance in terms of Sensitivity and Dynamic range.

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Subodh Johri, K. M. K. Srivatsa, J. P. Pachauri, L. P. Agarwal, Aji Baby, Harshad S. Kothari, and Babu Ram Singh "622-Mbps APD/FET optical front-end receiver: design, technology, and performance", Proc. SPIE 3666, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '98, (28 April 1999); https://doi.org/10.1117/12.347952

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