Method to transmit analog information by using a long distance photonic link with distributed feedback lasers biased in the low laser threshold current region

Alejandro Garcia-Juarez; Ignacio E. Zaldivar-Huerta; Jorge Rodriguez-AsomozaMaria del Rocio Gomez-Colin

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Method to transmit analog information by using a long distance photonic link with distributed feedback lasers biased in the low laser threshold current region

机译：Method to transmit analog information by using a long distance photonic link with distributed feedback lasers biased in the low laser threshold current region

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摘要

We describe an analog microwave photonic link system, which is used to transmit in a multiplexed way a TV signal over 30 km of standard optical fiber. The experimental setup is composed mainly by two distributed feedback (DFB) laser diodes emitting at 1500 nm. When these DFB lasers are operated in the low laser threshold current region, relaxation oscillation frequencies are obtained. Relaxation oscillations in the laser intensity can be seen as sidebands on both sides of the main laser line. The optical emissions generated in each laser are combined and amplified by using an erbium-doped fiber amplifier. Next, the amplified optical signal is detected by a fast photo-detector using direct detection method, and as result of this photo-detection, microwave signals are generated. Since microwave signals obtained by using this technique are tuned continuously; we can use them as electrical carriers to transmit simultaneously a TV signal at 4 and 5 GHz and over 30 km of standard optical fiber by using a Mach-Zehnder modulator. At the end of the optical link the modulated light is photo-detected in order to recover efficiently and successfully the analog TV signal.

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来源
《Optical Engineering》 |2012年第6期|065006-1-065006-12|共12页
作者
Alejandro Garcia-Juarez; Ignacio E. Zaldivar-Huerta; Jorge Rodriguez-AsomozaMaria del Rocio Gomez-Colin;
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作者单位

Universidad de las Americas-Puebla, Departamento de Ingenieria Electronica, Ex-hacienda Sta. Catarina Martir, Cholula, Puebla, C. P. 72820, Mexico;

Universidad de Sonora, Departamento de Fisica, C. P. 83000, Hermosillo, Sonora, Mexico;

Instituto Nacional de Astrofisica Optica y Electronica, Departamento de Electronica, Apdo. Postal 51 y 216, Puebla, C. P. 72000, MexicoUniversidad de Sonora, Departamento de Investigacion en Fisica, C. P. 83000, Hermosillo, Sonora, Mexico;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类计量学;
关键词
relaxation oscillation frequency; threshold current; distributed feed-back laser; direct detection; intensity modulation-direct detection systems; microwave photonics; microwave generation; microwave carriers;

Method to transmit analog information by using a long distance photonic link with distributed feedback lasers biased in the low laser threshold current region

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