Electrooptic 4 × 4 matrix switch for multimode fiber-optic systems

Richard A. Soref

doi:10.1364/AO.21.001386

Applied Optics
Vol. 21,
Issue 8,
pp. 1386-1393
(1982)
•https://doi.org/10.1364/AO.21.001386

Electrooptic 4 × 4 matrix switch for multimode fiber-optic systems

Richard A. Soref

Not Accessible

Your library or personal account may give you access

Get PDF
Email
Share
Get Citation
Copy Citation Text
Richard A. Soref, "Electrooptic 4 × 4 matrix switch for multimode fiber-optic systems," Appl. Opt. 21, 1386-1393 (1982)

Export Citation
- BibTex
- Endnote (RIS)
- HTML
- Plain Text
Citation alert
Save article

Abstract

A new fiber-optic switch for multimode fiber networks has been developed. This voltage-controlled device can switch light from any of four input fibers to any of four output fibers. Four input/output connections are made simultaneously, and the matrix has twenty-four such states. No moving parts are needed because the switching is accomplished with an electrooptic effect in nematic liquid crystals. Low levels of optical crosstalk, ∼40 dB below the output signal level, are obtained with a unique two-stage architecture. The design, construction, and observed performance of this optical switch are described.

Full Article | PDF Article

More Like This

Electrooptic Bragg diffraction switches in low cross-talk integrated-optics switching matrix

Elisabeth M. Philipp-Rutz, Robert Linares, and Mike Fakuda
Appl. Opt. 21(12) 2189-2194 (1982)

Electrooptic polarization switch for multimode fibers

A. R. Nelson and R. A. Soref
Appl. Opt. 16(1) 119-125 (1977)

Bistable magnetooptic switch for multimode optical fiber

M. Shirasaki, H. Takamatsu, and T. Obokata
Appl. Opt. 21(11) 1943-1949 (1982)

Previous Article Next Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Construction features	Specification
Overall size	2.8 × 2.8 × 12.0 cm
Liquid crystal layers	Two (mixture E9, EM Industries)
Glass prisms	Four (Schott Optical type SF14)
Halfwave plate	One 2.3- × 2.3- × 0.08-cm plastic sheet (Polaroid 280-nm retarder)
Nominal LC layer thickness	6.3 μm (from 0.25-mil Teflon tape)
Order of LC layer at V = 0	Parallel to walls, parallel to incidence plane
GRIN-rod lenses	Eight Selfoc SLS, 2-mm diam, 0.25 pitch at 633 nm, 0.35 N.A.
Fiber-optic guides	Eight 1-m strands, Corguide 1515, all-silica graded-index 5 dB/km
Fiber parameters	50-μm diam core, 125-μm o.d., 0.21 N.A.
No. of electrodes	Thirty-two, in two sets of sixteen
No. of addressed electrodes	Eight at a time
Electrode material	1000 Å of indium tin oxide
Optical cement	Devcon 30-min transparent epoxy

Parameter	Result
Number of optical conversations	Four at a time
Number of fourfold states	Twenty-four
Information bandwidth	300 MHz, estimated
Test wavelength	633 nm
Wavelength range of operation	500–2500 nm, estimated
Temperature range of operation	+7–+84°C, estimated
Switching speed	4.6-msec on–off 0.6-msec rise + delay, 4-msec fall
Circuit parameters	12-MΣ resistance/element, 140-pF capacitance/element
Control power	6 μW/element, estimated
Control voltage	40-V rms at 1 kHz
Optical insertion loss	6-dB min, 15-dB mean, 24-dB max
Optical cross talk at 40 V	<−53 dB for nineteen states, −53–−44 dB for five states
Repeatability	Excellent (not measured)
Lifetime of operation	Several years (not measured)

Construction features	Specification
Overall size	2.8 × 2.8 × 12.0 cm
Liquid crystal layers	Two (mixture E9, EM Industries)
Glass prisms	Four (Schott Optical type SF14)
Halfwave plate	One 2.3- × 2.3- × 0.08-cm plastic sheet (Polaroid 280-nm retarder)
Nominal LC layer thickness	6.3 μm (from 0.25-mil Teflon tape)
Order of LC layer at V = 0	Parallel to walls, parallel to incidence plane
GRIN-rod lenses	Eight Selfoc SLS, 2-mm diam, 0.25 pitch at 633 nm, 0.35 N.A.
Fiber-optic guides	Eight 1-m strands, Corguide 1515, all-silica graded-index 5 dB/km
Fiber parameters	50-μm diam core, 125-μm o.d., 0.21 N.A.
No. of electrodes	Thirty-two, in two sets of sixteen
No. of addressed electrodes	Eight at a time
Electrode material	1000 Å of indium tin oxide
Optical cement	Devcon 30-min transparent epoxy

Parameter	Result
Number of optical conversations	Four at a time
Number of fourfold states	Twenty-four
Information bandwidth	300 MHz, estimated
Test wavelength	633 nm
Wavelength range of operation	500–2500 nm, estimated
Temperature range of operation	+7–+84°C, estimated
Switching speed	4.6-msec on–off 0.6-msec rise + delay, 4-msec fall
Circuit parameters	12-MΣ resistance/element, 140-pF capacitance/element
Control power	6 μW/element, estimated
Control voltage	40-V rms at 1 kHz
Optical insertion loss	6-dB min, 15-dB mean, 24-dB max
Optical cross talk at 40 V	<−53 dB for nineteen states, −53–−44 dB for five states
Repeatability	Excellent (not measured)
Lifetime of operation	Several years (not measured)

Abstract

References

Cited By

Figures (11)

Tables (2)

Metrics

Applied Optics

Login or Create Account