Adjustable, high-sensitivity optical collimating scheme for free-space optic links

Shengli Ding; Jiankun Zhang; Anhong Dang

doi:10.1117/1.OE.55.11.110505

23 November 2016 Adjustable, high-sensitivity optical collimating scheme for free-space optic links

Shengli Ding, Jiankun Zhang, Anhong Dang

Author Affiliations +

Optical Engineering, Vol. 55, Issue 11, 110505 (November 2016). https://doi.org/10.1117/1.OE.55.11.110505

Abstract

In free-space optical (FSO) communications, signal beams suffer from atmospheric turbulence, transmission loss, and pointing errors. With different channel conditions, there exist different optimal divergence angles for the beams. Therefore, a high-performance adjustable collimator for the transmitter is an important component in an FSO system. An adjustable, high-sensitivity, optical collimating scheme is proposed. In the proposed scheme, a graded-index fiber is coated with palladium film and placed in a hydrogen environment and the graded-index fiber can be extended precisely while the palladium atoms react with the hydrogen molecules. Consequently, with different hydrogen pressures, the output beams present different divergence angles. Theoretical analysis and numerical calculation show that the output divergence angle can be precisely adjusted with the system design.

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Shengli Ding, Jiankun Zhang, and Anhong Dang "Adjustable, high-sensitivity optical collimating scheme for free-space optic links," Optical Engineering 55(11), 110505 (23 November 2016). https://doi.org/10.1117/1.OE.55.11.110505

Published: 23 November 2016

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