Title

Hybrid Analog-Digital Variable Fiber-Optic Delay Line

Keywords

Fiber Bragg grating (FBG); Fiber delay line (FDL); Optical delay; Variable delay

Abstract

A variable fiber-optic delay line (VFODL) is introduced that, to the best of the authors' knowledge, is the first time that a hybrid analog-digital VFODL is proposed to solve the dilemma of efficiently enabling many settable and long-duration time delays together with continuous and short time delays. In essence, this VFODL can provide near-continuous high-resolution time generation across an entire long-time-delay band. The VFODL is based on the concept of cascaded wavelength-sensitive and wavelength-insensitive time delays. A proof-of-concept VFODL built demonstrates near-continuous 0.5-ps-resolution time-delay control across an entire 25.6-ns time-delay band generating a total of 51200 measurable time-delay bins. The experimental VFODL also gives a 4.95-dB total optical loss and a 1-ms time-delay control-setting speed. The proposed VFODL can be used in applications such as radio frequency photonic signal processing and radar testing.

Publication Date

2-1-2004

Publication Title

Journal of Lightwave Technology

Volume

22

Issue

2

Number of Pages

619-624

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/JLT.2004.824383

Socpus ID

1942422108 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/1942422108

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