Relationship between threshold gain and Bragg detuning in photonic-crystal surface-emitting lasers

Zong Lin Li, Shen Chieh Lin, Yu Chen Chen, Gray Lin

研究成果: Conference contribution同行評審

摘要

The device characteristics of GaSb-based mid-infrared (MIR) photonic-crystal (PC) surface-emitting lasers (SELs) were investigated with respect to depths of etched PC holes. Measurement of below-Threshold emission spectra identifies the bandgap as well as band-edge modes. The bandgap separation, which is a function of feedback coupling, increases with increasing depth. From within, the Bragg frequencies and their detuning from lasing frequencies can be determined. Moreover, with increasing depth, the threshold pumping density decreases exponentially to a saturation level, which is assigned to minimum device modal gain of certain value. The relative threshold gain is then plotted as a function of normalized frequency detuning. The gain-detuning relationship of PCSELs is similar to that of one-dimensional (1D) distributed feedback (DFB) lasers.

原文English
主出版物標題AOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019
編輯Arnan Mitchell, Halina Rubinsztein-Dunlop
發行者SPIE
ISBN(電子)9781510631403
DOIs
出版狀態Published - 30 12月 2019
事件AOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019 - Melbourne, Australia
持續時間: 9 12月 201912 12月 2019

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
11200
ISSN(列印)0277-786X
ISSN(電子)1996-756X

Conference

ConferenceAOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019
國家/地區Australia
城市Melbourne
期間9/12/1912/12/19

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