A Novel Hemispherical Retro-Modulator for Free-Space Optical Communication Links

被引：3
|
作者：
MacGillivray, Alexander C. [1 ]
Gorgani, Sayra [1 ]
Hristovski, Ilija R. [1 ]
Jenne, Matthias F. [1 ]
Lesack, Nikolai I. [1 ]
Holzman, Jonathan F. [1 ]
机构：
[1] Univ British Columbia, Sch Engn, Kelowna, BC V1V 1V7, Canada
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2022年 / 34卷 / 09期
基金：
加拿大自然科学与工程研究理事会; 加拿大创新基金会;
关键词：
Electroabsorption; Franz-Keldysh effect; free-space optical communication; modulation; retroreflection; GAAS; INP;
D O I：
10.1109/LPT.2022.3165432
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We introduce a hemispherical retro-modulator in this work for use in passive free-space optical (FSO) communication links. It incorporates a high-refractive-index glass (S-LAH79) hemisphere for retroflection and a semi-insulating-InP (SI-InP) layer for modulation via electroabsorption. The electroabsorption is interpreted through a unified model of the Franz-Keldysh effect, on field-induced changes to absorption, and Einstein model, detailing hand-edge characteristics of absorption. The model is fit to experimental data with good agreement and is used to optimize the SI-InP layer. The hemispherical retromodulator is realized with a 600-mu m-thick SI-InP layer to give strong retroflection and modulation, at a depth of roughly 34%. Such operation can enable improved performance in passive FSO communication links.
引用
收藏
页码：494 / 497
页数：4
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