Recovering single-mode operation from multi-transverse mode VCSEL by wavelength-selective optical feedback

POSTER

Abstract

It is known that VCSEL can emit multiple high-order transverse modes due to spatial hole burning. The multi-transverse mode character of VCSEL is useful for applications in high-speed multimode data links and networks. However, for numerous applications in optical interconnects, optical recording, and optical communications, single-mode operation is essential. This work presents a self-seeding configuration of VCSEL by wavelength selective element (Etalon). Experimental results show that the laser was retrieved to a single high-order mode with low intensity noise and high spectrum purity. Selection of a particular high-order transverse mode has been achieved. The shorter feedback distance (10 cm) significantly increases the stability and the applicability of this technology in conventional laser systems.

*supported by NSC of R.O.C. under grand No. NSC-93-2215-E-272-001 and NSC-95-2112-M-110-015.

Authors

  • Da-Long Cheng

    • Department of Computer and Communication, SHU-TE University, Kaohsiung, Taiwan 824, R.O.C.

  • Tsu-Chiang Yen

    • Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan 804, R.O.C.
    • Department of Physics, National Sun Yat sen University, Kaohsiung, Taiwan 804, R.O.C.

  • Chuan-Pi Hsu

    • Department of Physics, National Sun Yat sen University, Kaohsiung, Taiwan 804, R.O.C.

  • Kuo-Sheng Kao

    • Department of Computer and Communication, SHU-TE University, Kaohsiung, Taiwan 824, R.O.C.