Abstract

A bulk polarization-rotation-based 1 × 2 optical switch is demonstrated by use of a birefringent-mode parallel-rub nematic liquid-crystal cell and a calcite Thompson-prism polarizing beam splitter. With 633-nm linearly polarized light the switch output ports exhibit a >36-dB optical isolation with less than ~0.75 dB of optical insertion loss. A <1.5-ms switching speed is demonstrated for a cascade cell optical arrangement by means of the transient nematic effect with >30 dB of optical isolation and −1.45 dB of optical loss.

© 1994 Optical Society of America

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References

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  1. N. A. Riza, J. Lightwave Technol. 10, 1974 (1992).
    [CrossRef]
  2. N. A. Riza, Proc. Soc. Photo-Opt. Instrum. Eng. 2026, 227 (1993).
  3. R. E. Wagner, J. Cheng, Appl. Opt. 19, 2921 (1980).
    [CrossRef] [PubMed]
  4. K. Kimura, N. Naito, S. Shirai, N. Yamauchi, Opt. Lett. 17, 1647 (1992).
    [CrossRef] [PubMed]
  5. J. L. Fergason, in IEEE/SID Conference Record of the Biennial Display Research Conference (Institute of Electrical and Electronics Engineers, New York, 1980), pp. 177–179.
  6. S. T. Wu, C. S. Wu, J. Appl. Phys. 65, 527 (1989).
    [CrossRef]

1993

N. A. Riza, Proc. Soc. Photo-Opt. Instrum. Eng. 2026, 227 (1993).

1992

1989

S. T. Wu, C. S. Wu, J. Appl. Phys. 65, 527 (1989).
[CrossRef]

1980

Cheng, J.

Fergason, J. L.

J. L. Fergason, in IEEE/SID Conference Record of the Biennial Display Research Conference (Institute of Electrical and Electronics Engineers, New York, 1980), pp. 177–179.

Kimura, K.

Naito, N.

Riza, N. A.

N. A. Riza, Proc. Soc. Photo-Opt. Instrum. Eng. 2026, 227 (1993).

N. A. Riza, J. Lightwave Technol. 10, 1974 (1992).
[CrossRef]

Shirai, S.

Wagner, R. E.

Wu, C. S.

S. T. Wu, C. S. Wu, J. Appl. Phys. 65, 527 (1989).
[CrossRef]

Wu, S. T.

S. T. Wu, C. S. Wu, J. Appl. Phys. 65, 527 (1989).
[CrossRef]

Yamauchi, N.

Appl. Opt.

J. Appl. Phys.

S. T. Wu, C. S. Wu, J. Appl. Phys. 65, 527 (1989).
[CrossRef]

J. Lightwave Technol.

N. A. Riza, J. Lightwave Technol. 10, 1974 (1992).
[CrossRef]

Opt. Lett.

Proc. Soc. Photo-Opt. Instrum. Eng.

N. A. Riza, Proc. Soc. Photo-Opt. Instrum. Eng. 2026, 227 (1993).

Other

J. L. Fergason, in IEEE/SID Conference Record of the Biennial Display Research Conference (Institute of Electrical and Electronics Engineers, New York, 1980), pp. 177–179.

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Figures (3)

Fig. 1
Fig. 1

(a) Experimental setup used to demonstrate the principle of the birefringent-mode NLC free-space optical switch. (b) Experimental setup of the switch with the bias cell (NLCB) and NLC1 using the transient nematic effect for a faster response time while maintaining high on/off isolation. (c) Switch with two identical NLC cells (NLC1 and NLC2) that are driven in parallel and positioned in a cascade arrangement to obtain a faster NLC response time by use of the transient nematic effect. TPBS1 is used as a polarizer, whereas TPBS2 acts as a beam splitter. Vb, bias voltage.

Fig. 2
Fig. 2

Measured optical power data for port 1 of the switch in Fig. 1(b) that uses NLCB and NLC1 operating in the high-voltage transient nematic mode. In this case the optical isolation is 36 dB.

Fig. 3
Fig. 3

(a), (b) Driving signals (top traces) and fast NLC on/off response times (bottom traces) for the switches in Figs. 1(b) and 1(c), respectively, by use of the transient nematic effect for NLC1 and NLC2. The measured rise times are 6 and 1.5 ins for the switches in Figs. 1(b) and 1(c), respectively.

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