Distributed-feedback grating used as a lateral-mode selector in phase-locked antiguided arrays

Autor:	Dan Botez, M. Nesnidal, Luke J. Mawst
Rok vydání:	1997
Předmět:	Physics Distributed feedback laser Discriminator business.industry Oscillation Phase (waves) Resonance Optical field Grating Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Optics Optoelectronics Electrical and Electronic Engineering business Diffraction grating
Zdroj:	IEEE Photonics Technology Letters. 9:34-36
ISSN:	1941-0174 1041-1135
Popis:	We show here, for the first time, that a distributed-feedback (DFB) grating can act as a lateral-mode discriminator if located below the active region of a phase-locked antiguided array. Spatial-mode selection from such a lower-DFB (LDFB) grating in a resonant antiguided structure (ROW-LDFB) relies on the fact that the optical field distribution below the active region is strongly array-mode dependent. In particular, it is shown that at and near resonance a ROW-LDFB structure strongly favors resonant-mode oscillation, while suppressing oscillation of high-order modes. ROW-LDFB devices thus accomplish both spatial- and frequency-mode selection in a single structure. Furthermore, for effective intermodal discrimination, there is no need for interelement loss or Talbot-type filters, thus eliminating all potential sources of self-pulsations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5b035e88e892245c481cb55738152789 https://doi.org/10.1109/68.554162 Zobrazit plný text záznamu