For demonstrating widely tunable external cavity lasers operating for near-infrared (NIR) wavelength, a flexible polymer waveguide with an imbedded Bragg grating is incorporated. Due to the superior flexibility of the polymer material, the reflection wavelength of the Bragg grating is widely tunable by imposing tensile and compressive strains on the flexible Bragg grating. A third-order Bragg grating is formed on the device for facilitating the fabrication method. With a superluminescent laser diode as a gain medium of ECL, the tunable laser exhibited output power of -3 dBm and a tuning range of 32 nm.
© 2013 Optical Society of Korea
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3600) Lasers and laser optics : Lasers, tunable
(230.1480) Optical devices : Bragg reflectors
(130.5460) Integrated optics : Polymer waveguides
Original Manuscript: October 4, 2012
Revised Manuscript: November 15, 2012
Manuscript Accepted: November 16, 2012
Published: April 25, 2013
Jun-Whee Kim, Kyung-Jo Kim, Nam-Seon Son, and Min-Cheol Oh, "Strain-imposed External Cavity Tunable Lasers Operating for NIR Wavelength," J. Opt. Soc. Korea 17, 172-176 (2013)
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