Digitally controlled optical fiber delay line

Details Digitally controlled optical fiber delay line Digitally controlled optical fiber delay line

2007-10-16

2007-10-16

Pak, Sung (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S047000

Reexamination Certificate

active

10749187

ABSTRACT:
An optical fiber delay line includes: multiple differential delay lines; and multiple switchers connecting the differential delay lines in pairs. Using, for example, N+1 differential delay lines numbered by k from 0 to N, the k-th differential delay line delays an input optical signal by an amount of time (tkA−tkB)=2kτ, so that the electronically controlled switchers allow digitally controlling the delay over a range from 0 to (2N+1−1)τ with a time resolution of τ. The delay line can also be used simultaneously as a phase modulator, enabling a system of synchronization that can be realized entirely electronically and may be very useful in the case of large fiber arrays comprising a number of fiber modules such as beam splitters, fiber amplifiers, connectors, and collimators. The delay line can also be used as a commutator, for controlled switching of optical signals between channels.

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Product information sheet, 2 pages, ODL 330, SANTEC Corp., Hackensack, NJ, USA.
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Product information sheet, 2 pages, http://www.littleoptics.com/delay.pdf, Little Optics, Inc., Annapolis Junction, MD, USA.

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