Title :
Widely tunable coupled-ring reflector laser diode
Author :
Chung, Youngchul ; Kim, Doo-Gun ; Dagli, Nadir
Author_Institution :
Dept. of Electron. & Commun. Eng., Kwangwoon Univ., Seoul, South Korea
Abstract :
A coupled-ring reflector (CRR), which is composed of two coupled rings both of which are coupled with a straight waveguide, is applied to a widely tunable laser diode. When the radii of two rings are slightly different, the peak reflection wavelength of the CRR can be widely tuned over a few tens nanometers by a small amount of refractive index change. It is shown that a few tens nanometers of tuning with a sidemode suppression ratio exceeding 45 dB both for adjacent cavity mode and for adjacent ring mode is achievable in the widely tunable CRR laser diode.
Keywords :
integrated optics; laser cavity resonators; laser modes; laser tuning; optical couplers; refractive index; ring lasers; semiconductor lasers; waveguide lasers; cavity mode; coupled-ring reflector laser diode tuning; refractive index; ring mode; sidemode suppression ratio; straight waveguide; Diode lasers; Laser tuning; Optical coupling; Optical filters; Optical reflection; Optical ring resonators; Refractive index; Resonance; Resonator filters; Tunable circuits and devices; Integrated optics; ring resonators; tunable filters; tunable laser diodes;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.852643
