Dr. Robert J. Simes Profile

Dr. Robert J. Simes

Bolometer Process Manager at FLIR Systems

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Proceedings Article | 8 December 2003 Paper

InP chip scale integration platform for high-performance tunable lasers

Robert Simes, Gregory Fish, Patrick Abraham, Yuliya Akulova, Christopher Coldren, Marlin Focht, Eric Hall, Mike Larson, Hugues Marchand, Peter Kozodoy, Anders Dahl, Ping Koh, T. Strand

Proceedings Volume 5248, (2003) https://doi.org/10.1117/12.512280

KEYWORDS: Mirrors, Transmitters, Modulators, Tunable lasers, Calibration, Reliability, Modulation, Semiconductor lasers, Manufacturing, Continuous wave operation

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Tunable semiconductor lasers have been listed in numerous critical technology lists for future optical communication systems. Lasers with full band tuning ranges (C or L) allow reduction of the inventory cost and simplify deployment and operation of existing systems in addition to enabling wavelength agile networking concepts in future systems. Furthermore, monolithic integration of full band tunable lasers with modulators to form complete transmitters offers the most potential for reducing system size, weight, power consumption, and cost. This paper summarizes design, fabrication technology, and performance characteristics of widely tunable CW sources and transmitters based on chip scale integration of a Sampled Grating Distributed Bragg Reflector (SG DBR) laser with a Semiconductor Optical Amplifier (SOA) and Electroabsorption (EA) or Mach Zehnder (MZ) modulator. Widely tunable CW sources based on SG-DBR lasers exhibit high fiber coupled output power (20 mW CW) and side mode suppression ratio (>40 dB), low relative intensity noise (below -140 dB/Hz) and line width (<5 MHz) across a 40 nm C-band tuning range. Characteristics of EA-modulated optical transmitters include fiber-coupled time-averaged powers in excess of 5 dBm, RF extinction ratios > 10 dB, and error-free transmission over 350 km of standard fiber at 2.5 Gb/s across a 40 nm tuning range. Monolithic integration of widely tunable lasers with MZ modulators allow for further extension of bit rate (10 Gb/s and beyond) and transmission distances through precise control of the transient chirp of the transmitter. Systematic investigations of accelerated aging confirm that reliability of these widely-tunable transmitters is sufficient for system deployment.

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