Abstract

An implementation technique of an evanescent switch using a cylindrical piezoelectric driver material is discussed. The driver has provisions for fine alignment of the prisms. The selection criteria for the choice of the prism material are evaluated in detail. The measured insertion loss was 10% ± 2%, and these are a 4000: 1 extinction ratio at 10.6 μm between the ON and OFF positions of the switch. The curve showing attenuation vs voltage applied across the piezoelectric driver indicates a large dynamic range for the device as a variable attenuator.

© 1981 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. I. N. Court, F. K. von Willisen, Appl. Opt. 3, 719 (1964).
    [CrossRef]

1964

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (9)

Fig. 1
Fig. 1

Evanescent switch configuration.

Fig. 2
Fig. 2

Transmission vs element spacing.

Fig. 3
Fig. 3

Minimum separation as a function of n.

Fig. 4
Fig. 4

Transmission vs refractive index.

Fig. 5
Fig. 5

Transmission vs normalized spacing as a function of n.

Fig. 6
Fig. 6

Transmission vs normalized spacing as a function of ϕ0.

Fig. 7
Fig. 7

Evanescent switch configuration.

Fig. 8
Fig. 8

Experimental setup for testing on–off ratio of the evanescent attenuator.

Fig. 9
Fig. 9

Measured transmission of an evanescent switch.

Tables (1)

Tables Icon

Table I ZnSe Characteristics at 10.6 μm

Equations (7)

Equations on this page are rendered with MathJax. Learn more.

sin θ 1 > n 0 n 1 ,
1 T = A sin h 2 y = B ,
y = 2 π d λ n 1 2 sin 2 θ 1 - 1 ,
A s = ( n 1 2 - 1 ) 2 4 n 1 2 cos 2 θ 1 ( n 1 2 sin 2 θ 1 - 1 ) ,
B s = 1 ,
A p = A s [ ( n 1 2 + 1 ) sin 2 θ 1 - 1 ] 2 ,
B p = 1.

Metrics