Polymer-Based External Cavity Lasers: Tuning Efficiency, Reliability, and Polarization Diversity
- 16 May 2014
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 26 (14) , 1391-1394
- https://doi.org/10.1109/lpt.2014.2324760
Abstract
Three aspects of polymer-based external cavity tunable lasers are investigated. First, the tuning efficiency is increased from 0.29 nm/mW to a record 0.52 nm/mW by improving the microheater thermal design. Second, the long-term reliability of such tunable laser modules is investigated through two batches of stress tests at 25 °C and 45 °C, respectively. No degradation effect is observed in terms of output power drop and wavelength drifting after thousands of hours of continuous operation at tuned wavelength of 20 nm. Finally, a novel TM-emitting tunable laser is demonstrated by inserting a half-wave plate into the polymer output waveguide. Index-matching techniques and the intrinsic curved waveguide design guarantee robust single mode operation. The TM laser exhibits excellent side mode suppression ratio (>40 dB), large tuning range (>20 nm), and high output power (>5 mW at 100-mA drive current).Keywords
Funding Information
- CELTIC-SASER Project through the German Federal Ministry of Education and Research
- European Commission (EU FP-7 POLYSYS)
- PANTHER
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