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Proceedings Paper

SGDBR single-chip wavelength tunable lasers for swept source OCT
Author(s): Dennis Derickson; Michael Bernacil; Andrew DeKelaita; Ben Maher; Shane O'Connor; Matthew N. Sysak; Leif Johanssen
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Paper Abstract

Sampled Grating Distributed Bragg Reflector (SGDBR) monolithic tunable lasers are now entering the production phase in telecommunications applications. These tunable lasers are unique in that they offer wide wavelength tuning (1525 to 1565 nm), fast wavelength tuning (5 ns) and high speed amplitude modulation all on the same monolithic chip1,2,3,4. This work studies the applicability of SGDBR monolithic tunable laser diodes for biomedical imaging using swept-wavelength or Fourier domain optical coherence tomography. This paper will present our work involved with utilizing the strengths (table 1) of this SGDBR laser class and mitigating the weaknesses (table 2) of this device for swept-wavelength imaging applications. The strengths of the laser are its small size (portable solutions), wide wavelength range (good distance resolution), fast switching speeds (improved update rates), wide choice of center wavelengths, and lower power consumption. The weaknesses being addressed are the complicated wavelength tuning mechanism (3 wavelength control currents), wider laser linewidth (10s of MHz), moderate output power (10mW ), and the need for improved laser packaging. This paper will highlight the source characterization results and discuss an initial measurement architecture utilizing the SGDBR measurement engine.

Paper Details

Date Published: 28 February 2008
PDF: 11 pages
Proc. SPIE 6847, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII, 68472P (28 February 2008); doi: 10.1117/12.761039
Show Author Affiliations
Dennis Derickson, California Polytechnic State Univ. (United States)
Michael Bernacil, California Polytechnic State Univ. (United States)
Andrew DeKelaita, California Polytechnic State Univ. (United States)
Ben Maher, California Polytechnic State Univ. (United States)
Shane O'Connor, California Polytechnic State Univ. (United States)
Matthew N. Sysak, Univ. of California/Santa Barbara (United States)
Leif Johanssen, Univ. of California/Santa Barbara (United States)


Published in SPIE Proceedings Vol. 6847:
Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII
Joseph A. Izatt; James G. Fujimoto; Valery V. Tuchin, Editor(s)

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