Electrically controlled optical attenuators and switches with ferroelectric liquid crystals

Arto Karppinen, Stefan Lottholz, Risto Myllylä, G. Andersson, M. Matuszczyk, K. Skarp, I. Dahl, S Lagerwall

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

Electro-optic modulators can be used as choppers, function generators or optical power controllers. The materials dealt with are PLZT ceramics and nematic LC compared with smectic A and C LCs. PLZT is fast in the scatter mode, but its contrast is poor. The NCAP nematic LC structure has a high contrast, but is slow. Both PLZT ceramics and smectic phases can achieve microsecond switching times in the polarization mode. The achieved contrast is high with PLZT, while with LCs it depends on the switching speed. A modulator based on polarization has a complicated structure when non-polarized light is used.

Original languageEnglish
Pages (from-to)93 - 97
Number of pages5
JournalFerroelectrics
Volume114
Issue number1
DOIs
Publication statusPublished - 1991
MoE publication typeA1 Journal article-refereed

Fingerprint

Liquid Crystals
attenuators
Liquid crystals
Modulators
Ferroelectric materials
switches
liquid crystals
Switches
Polarization
Function generators
modulators
Electrooptical effects
function generators
ceramics
electric choppers
polarization
Controllers
electro-optics
controllers

Cite this

Karppinen, A., Lottholz, S., Myllylä, R., Andersson, G., Matuszczyk, M., Skarp, K., ... Lagerwall, S. (1991). Electrically controlled optical attenuators and switches with ferroelectric liquid crystals. Ferroelectrics, 114(1), 93 - 97. https://doi.org/10.1080/00150199108221572
Karppinen, Arto ; Lottholz, Stefan ; Myllylä, Risto ; Andersson, G. ; Matuszczyk, M. ; Skarp, K. ; Dahl, I. ; Lagerwall, S. / Electrically controlled optical attenuators and switches with ferroelectric liquid crystals. In: Ferroelectrics. 1991 ; Vol. 114, No. 1. pp. 93 - 97.
@article{45e874c0df2d469d81ff0c42db9e6180,
title = "Electrically controlled optical attenuators and switches with ferroelectric liquid crystals",
abstract = "Electro-optic modulators can be used as choppers, function generators or optical power controllers. The materials dealt with are PLZT ceramics and nematic LC compared with smectic A and C LCs. PLZT is fast in the scatter mode, but its contrast is poor. The NCAP nematic LC structure has a high contrast, but is slow. Both PLZT ceramics and smectic phases can achieve microsecond switching times in the polarization mode. The achieved contrast is high with PLZT, while with LCs it depends on the switching speed. A modulator based on polarization has a complicated structure when non-polarized light is used.",
author = "Arto Karppinen and Stefan Lottholz and Risto Myllyl{\"a} and G. Andersson and M. Matuszczyk and K. Skarp and I. Dahl and S Lagerwall",
year = "1991",
doi = "10.1080/00150199108221572",
language = "English",
volume = "114",
pages = "93 -- 97",
journal = "Ferroelectrics",
issn = "0015-0193",
publisher = "Taylor & Francis",
number = "1",

}

Karppinen, A, Lottholz, S, Myllylä, R, Andersson, G, Matuszczyk, M, Skarp, K, Dahl, I & Lagerwall, S 1991, 'Electrically controlled optical attenuators and switches with ferroelectric liquid crystals', Ferroelectrics, vol. 114, no. 1, pp. 93 - 97. https://doi.org/10.1080/00150199108221572

Electrically controlled optical attenuators and switches with ferroelectric liquid crystals. / Karppinen, Arto; Lottholz, Stefan; Myllylä, Risto; Andersson, G.; Matuszczyk, M.; Skarp, K.; Dahl, I.; Lagerwall, S.

In: Ferroelectrics, Vol. 114, No. 1, 1991, p. 93 - 97.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Electrically controlled optical attenuators and switches with ferroelectric liquid crystals

AU - Karppinen, Arto

AU - Lottholz, Stefan

AU - Myllylä, Risto

AU - Andersson, G.

AU - Matuszczyk, M.

AU - Skarp, K.

AU - Dahl, I.

AU - Lagerwall, S

PY - 1991

Y1 - 1991

N2 - Electro-optic modulators can be used as choppers, function generators or optical power controllers. The materials dealt with are PLZT ceramics and nematic LC compared with smectic A and C LCs. PLZT is fast in the scatter mode, but its contrast is poor. The NCAP nematic LC structure has a high contrast, but is slow. Both PLZT ceramics and smectic phases can achieve microsecond switching times in the polarization mode. The achieved contrast is high with PLZT, while with LCs it depends on the switching speed. A modulator based on polarization has a complicated structure when non-polarized light is used.

AB - Electro-optic modulators can be used as choppers, function generators or optical power controllers. The materials dealt with are PLZT ceramics and nematic LC compared with smectic A and C LCs. PLZT is fast in the scatter mode, but its contrast is poor. The NCAP nematic LC structure has a high contrast, but is slow. Both PLZT ceramics and smectic phases can achieve microsecond switching times in the polarization mode. The achieved contrast is high with PLZT, while with LCs it depends on the switching speed. A modulator based on polarization has a complicated structure when non-polarized light is used.

U2 - 10.1080/00150199108221572

DO - 10.1080/00150199108221572

M3 - Article

VL - 114

SP - 93

EP - 97

JO - Ferroelectrics

JF - Ferroelectrics

SN - 0015-0193

IS - 1

ER -

Karppinen A, Lottholz S, Myllylä R, Andersson G, Matuszczyk M, Skarp K et al. Electrically controlled optical attenuators and switches with ferroelectric liquid crystals. Ferroelectrics. 1991;114(1):93 - 97. https://doi.org/10.1080/00150199108221572