High-speed ultra-broad tuning MEMS-VCSELs for imaging and spectroscopy
Author(s)
Jayaraman, Vijaysekhar; Potsaid, B.; Jiang, J.; Cole, G. D.; Robertson, M. E.; Burgner, C. B.; John, D. D.; Choi, W.; Liu, J.; Stein, B. A.; Sanders, S. T.; Cable, Alex E.; Grulkowski, Ireneusz; Tsai, Tsung-Han; Fujimoto, James G.; ... Show more Show less
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In the last 2 years, the field of micro-electro-mechanical systems tunable vertical cavity surface-emitting lasers (MEMS-VCSELs) has seen dramatic improvements in laser tuning range and tuning speed, along with expansion into unexplored wavelength bands, enabling new applications. This paper describes the design and performance of high-speed ultra-broad tuning range 1050nm and 1310nm MEMS-VCSELs for medical imaging and spectroscopy. Key results include achievement of the first MEMS-VCSELs at 1050nm and 1310nm, with 100nm tuning demonstrated at 1050nm and 150nm tuning at shown at 1310nm. The latter result represents the widest tuning range of any MEMS-VCSEL at any wavelength. Wide tuning range has been achieved in conjunction with high-speed wavelength scanning at rates beyond 1 MHz. These advances, coupled with recent demonstrations of very long MEMS-VCSEL dynamic coherence length, have enabled advancements in both swept source optical coherence tomography (SS-OCT) and gas spectroscopy. VCSEL-based SS-OCT at 1050nm has enabled human eye imaging from the anterior eye through retinal and choroid layers using a single instrument for the first time. VCSEL-based SS-OCT at 1310nm has enabled real-time 3-D SS-OCT imaging of large tissue volumes in endoscopic settings. The long coherence length of the VCSEL has also enabled, for the first time, meter-scale SS-OCT applicable to industrial metrology. With respect to gas spectroscopy, narrow dynamic line-width has allowed accurate high-speed measurement of multiple water vapor and HF absorption lines in the 1310nm wavelength range, useful in gas thermometry of dynamic combustion engines.
Date issued
2013-05Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer ScienceJournal
Proceedings of SPIE--the International Society for Optical Engineering
Publisher
SPIE
Citation
Jayaraman, V., B. Potsaid, J. Jiang, G. D. Cole, M. E. Robertson, C. B. Burgner, D. D. John, et al. “High-Speed Ultra-Broad Tuning MEMS-VCSELs for Imaging and Spectroscopy.” Edited by Ulrich Schmid, José Luis Sánchez de Rojas Aldavero, and Monika Leester-Schaedel. Smart Sensors, Actuators, and MEMS VI (May 17, 2013). © 2013 SPIE
Version: Final published version
ISSN
0277-786X
0277-7813