Abstract

A new assembly method is described for easy construction of optical modules consisting of guide frames, spacer frames, and a housing frame. This method is used to assemble a two-dimensional optical-fiber collimator and a digital discrete correlator, which are fundamental parts of free-space optical computing systems. We show that a multistage optical system can be constructed simply by stacking of several optical functional blocks. Moreover, these compact modules do not need a conventional optical bench, they are compact, and assembly time is reduced. We demonstrated by experiment that the accuracy of optical modules assembled with this method is within the specifications of the optical system.

© 1995 Optical Society of America

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  1. F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).
  2. S. Kawai, S. Araki, H. Kurita, T. Numai, K. Kasahara, K. Kubota, “Multistage optical interconnection network using VSTEP’s and microoptics,” in Fourth Micro-Optics Conference/11th Topical Meeting on Gradient Indexes, K. Goto, K. Nishizawa, eds. (Japan Society of Applied Physics, Kanagawa, 1993), pp. 328–331.
  3. K. Koyabu, F. Ohira, T. Yamamoto, S. Matsuo, “Novel high-density collimator module,” in Optical Fiber Communication Conference and International Conference on Integrated Optics and Optical Fiber Communication, Vol. 4 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), pp. 2–3.
  4. M. Fukui, K. Kitayama, “Experiments of fundamental operations of image logic algebra using discrete digital correlation,” in Proceedings of the Topical Meeting of the International Commission for Optics, Y. Ichioka, ed. (ICO, Kyoto, 1994), paper 7P–1.
  5. Y. Ikeda, E. Okuda, M. Oikawa, “Graded-index optical waveguides and planar microlens arrays and their applications,” in Proceedings of the European Fiber Optics Conference/Local Area Networks ’87 (Information Gatekeepers, Boston, Mass., 1987), pp. 103–107.

Araki, S.

S. Kawai, S. Araki, H. Kurita, T. Numai, K. Kasahara, K. Kubota, “Multistage optical interconnection network using VSTEP’s and microoptics,” in Fourth Micro-Optics Conference/11th Topical Meeting on Gradient Indexes, K. Goto, K. Nishizawa, eds. (Japan Society of Applied Physics, Kanagawa, 1993), pp. 328–331.

Brubaker, J. L.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Cloonan, T. J.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Crisci, R. J.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Fukui, M.

M. Fukui, K. Kitayama, “Experiments of fundamental operations of image logic algebra using discrete digital correlation,” in Proceedings of the Topical Meeting of the International Commission for Optics, Y. Ichioka, ed. (ICO, Kyoto, 1994), paper 7P–1.

Herron, M. J.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Hinterlong, S. J.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Ikeda, Y.

Y. Ikeda, E. Okuda, M. Oikawa, “Graded-index optical waveguides and planar microlens arrays and their applications,” in Proceedings of the European Fiber Optics Conference/Local Area Networks ’87 (Information Gatekeepers, Boston, Mass., 1987), pp. 103–107.

Kasahara, K.

S. Kawai, S. Araki, H. Kurita, T. Numai, K. Kasahara, K. Kubota, “Multistage optical interconnection network using VSTEP’s and microoptics,” in Fourth Micro-Optics Conference/11th Topical Meeting on Gradient Indexes, K. Goto, K. Nishizawa, eds. (Japan Society of Applied Physics, Kanagawa, 1993), pp. 328–331.

Kawai, S.

S. Kawai, S. Araki, H. Kurita, T. Numai, K. Kasahara, K. Kubota, “Multistage optical interconnection network using VSTEP’s and microoptics,” in Fourth Micro-Optics Conference/11th Topical Meeting on Gradient Indexes, K. Goto, K. Nishizawa, eds. (Japan Society of Applied Physics, Kanagawa, 1993), pp. 328–331.

Kitayama, K.

M. Fukui, K. Kitayama, “Experiments of fundamental operations of image logic algebra using discrete digital correlation,” in Proceedings of the Topical Meeting of the International Commission for Optics, Y. Ichioka, ed. (ICO, Kyoto, 1994), paper 7P–1.

Koyabu, K.

K. Koyabu, F. Ohira, T. Yamamoto, S. Matsuo, “Novel high-density collimator module,” in Optical Fiber Communication Conference and International Conference on Integrated Optics and Optical Fiber Communication, Vol. 4 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), pp. 2–3.

Kubota, K.

S. Kawai, S. Araki, H. Kurita, T. Numai, K. Kasahara, K. Kubota, “Multistage optical interconnection network using VSTEP’s and microoptics,” in Fourth Micro-Optics Conference/11th Topical Meeting on Gradient Indexes, K. Goto, K. Nishizawa, eds. (Japan Society of Applied Physics, Kanagawa, 1993), pp. 328–331.

Kurita, H.

S. Kawai, S. Araki, H. Kurita, T. Numai, K. Kasahara, K. Kubota, “Multistage optical interconnection network using VSTEP’s and microoptics,” in Fourth Micro-Optics Conference/11th Topical Meeting on Gradient Indexes, K. Goto, K. Nishizawa, eds. (Japan Society of Applied Physics, Kanagawa, 1993), pp. 328–331.

Lentine, A. L.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Matsuo, S.

K. Koyabu, F. Ohira, T. Yamamoto, S. Matsuo, “Novel high-density collimator module,” in Optical Fiber Communication Conference and International Conference on Integrated Optics and Optical Fiber Communication, Vol. 4 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), pp. 2–3.

McCormick, F. B.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Morrison, R. L.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Numai, T.

S. Kawai, S. Araki, H. Kurita, T. Numai, K. Kasahara, K. Kubota, “Multistage optical interconnection network using VSTEP’s and microoptics,” in Fourth Micro-Optics Conference/11th Topical Meeting on Gradient Indexes, K. Goto, K. Nishizawa, eds. (Japan Society of Applied Physics, Kanagawa, 1993), pp. 328–331.

Ohira, F.

K. Koyabu, F. Ohira, T. Yamamoto, S. Matsuo, “Novel high-density collimator module,” in Optical Fiber Communication Conference and International Conference on Integrated Optics and Optical Fiber Communication, Vol. 4 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), pp. 2–3.

Oikawa, M.

Y. Ikeda, E. Okuda, M. Oikawa, “Graded-index optical waveguides and planar microlens arrays and their applications,” in Proceedings of the European Fiber Optics Conference/Local Area Networks ’87 (Information Gatekeepers, Boston, Mass., 1987), pp. 103–107.

Okuda, E.

Y. Ikeda, E. Okuda, M. Oikawa, “Graded-index optical waveguides and planar microlens arrays and their applications,” in Proceedings of the European Fiber Optics Conference/Local Area Networks ’87 (Information Gatekeepers, Boston, Mass., 1987), pp. 103–107.

Sasian, J. M.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Tooley, F. A. P.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Walker, S. L.

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

Yamamoto, T.

K. Koyabu, F. Ohira, T. Yamamoto, S. Matsuo, “Novel high-density collimator module,” in Optical Fiber Communication Conference and International Conference on Integrated Optics and Optical Fiber Communication, Vol. 4 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), pp. 2–3.

Other (5)

F. B. McCormick, F. A. P. Tooley, J. L. Brubaker, J. M. Sasian, T. J. Cloonan, A. L. Lentine, R. L. Morrison, R. J. Crisci, S. L. Walker, S. J. Hinterlong, M. J. Herron, “Optomechanics of a free-space photonic switching fabric: the system,” in Optomechanics and Dimensional Stability, R. A. Paquin, D. Vukobratovich, eds., Proc. Soc. Photo-Opt. Instrum. Eng.1533, 91–114 (1991).

S. Kawai, S. Araki, H. Kurita, T. Numai, K. Kasahara, K. Kubota, “Multistage optical interconnection network using VSTEP’s and microoptics,” in Fourth Micro-Optics Conference/11th Topical Meeting on Gradient Indexes, K. Goto, K. Nishizawa, eds. (Japan Society of Applied Physics, Kanagawa, 1993), pp. 328–331.

K. Koyabu, F. Ohira, T. Yamamoto, S. Matsuo, “Novel high-density collimator module,” in Optical Fiber Communication Conference and International Conference on Integrated Optics and Optical Fiber Communication, Vol. 4 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), pp. 2–3.

M. Fukui, K. Kitayama, “Experiments of fundamental operations of image logic algebra using discrete digital correlation,” in Proceedings of the Topical Meeting of the International Commission for Optics, Y. Ichioka, ed. (ICO, Kyoto, 1994), paper 7P–1.

Y. Ikeda, E. Okuda, M. Oikawa, “Graded-index optical waveguides and planar microlens arrays and their applications,” in Proceedings of the European Fiber Optics Conference/Local Area Networks ’87 (Information Gatekeepers, Boston, Mass., 1987), pp. 103–107.

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Figures (9)

Fig. 1
Fig. 1

Optical module configuration using the guide-frame method.

Fig. 2
Fig. 2

Assembly processes.

Fig. 3
Fig. 3

Configuration of the optical I/O port block.

Fig. 4
Fig. 4

Photograph of the optical I/O port block.

Fig. 5
Fig. 5

Photographs of the observed optical beam spots.

Fig. 6
Fig. 6

Map of positioning error of the optical beam spots.

Fig. 7
Fig. 7

Optical system configuration of the DDC. The DDC shifts the image up and down, left and right, and overlaps the shifted image with images generated from other point-light sources. P1 is the point-light-source array plane, P2 is the image input plane, and P3 is the image output plane. d is the spacing between the back focal plane of L3 and the front focal plane of L4 and is the parameter that determines the amount of shifting of the output image. C is the distance between the back focal plane of L5 and P3, and it is also determined by d.

Fig. 8
Fig. 8

Photographs of the DDC module: (a) components of the DDC module, (b) the assembled DDC module.

Fig. 9
Fig. 9

Experimental results of discrete correlation.

Tables (2)

Tables Icon

Table 1 Specifications of the Two-Dimensional Optical-Fiber Collimator Module Components

Tables Icon

Table 2 Specifications of the Digital-Discrete-Correlator Module Components

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