Title :
Long-Wavelength VCSEL Using High-Contrast Grating
Author :
Yi Rao ; Weijian Yang ; Chase, Chris ; Huang, M.C.Y. ; Worland, D.D.P. ; Khaleghi, S. ; Chitgarha, M.R. ; Ziyadi, M. ; Willner, Alan E. ; Chang-Hasnain, Connie J.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of California at Berkeley, Berkeley, CA, USA
Abstract :
Recent advances in high-contrast grating (HCG) vertical-cavity surface-emitting lasers (VCSEL) emitting at 1550 nm is reported in this paper. The novel near-wavelength HCG has an ultrathin structure and broadband reflectivity. It enables a monolithic, simple fabrication process for realizing InP-based VCSELs emitting at ~1550 nm. We report 2.4-mW single-mode output under continuous-wave operation at 15°C. We show that, despite broadened by the Brownian motion, the HCG-VCSEL has a total linewidth of 60 MHz or a coherent length of 5 m in air, and an intrinsic linewidth <;20 MHz. Transmission of directly modulated 10 Gbps over 100-km dispersion-compensated single-mode fiber is demonstrated. Tunable HCG-VCSEL is demonstrated with the HCG integrated with a micro-electro-mechanical structure. Continuous wavelength tuning as wide as 26.3 nm is achieved. The tunable VCSEL was used as a source for external modulation for 40-Gbps differential-phase-shift-keyed signal and transmitted over 100-km dispersion-compensated link with negligible power penalty.
Keywords :
Brownian motion; III-V semiconductors; differential phase shift keying; diffraction gratings; indium compounds; laser tuning; micromechanical devices; optical fibre dispersion; reflectivity; spectral line broadening; surface emitting lasers; Brownian motion; InP; bit rate 10 Gbit/s; bit rate 40 Gbit/s; broadband reflectivity; continuous wavelength tuning; differential phase shift keying; dispersion compensated single mode fiber; distance 100 km; external modulation; high-contrast grating; long-wavelength VCSEL; microelectromechanical structure; power 2.4 mW; power penalty; temperature 15 degC; tunable HCG-VCSEL; vertical cavity surface emitting lasers; wavelength 1550 nm; Delay; Fiber lasers; Gratings; Micromechanical devices; Optical fiber communication; Reflectivity; Vertical cavity surface emitting lasers; High-contrast subwavelength grating; laser linewidth; optical MEMS; optical communication; vertical-cavity surface-emitting laser (VCSEL);
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2013.2246780
