Abstract

A machining technique has been developed that enables a narrow, smooth damage-free walled trench to be cut into an optical fiber engraved in a silica substrate by using a fine silica powder effect. This technique allows a very low insertion loss (0.21 dB) in-line microfilter to be made by inserting a thin filter plate into a trench cut into an optical fiber already fixed to a substrate.

© 1992 Optical Society of America

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References

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  1. H. Yanagawa, H. Hayakawa, T. Ochiai, S. Yano, H. Miyazawa, “Low loss in-line single-mode filter,” in Optical Fiber Communication, Vol. 1 of OSA 1990 Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper TUG3.
  2. S. Matsui, J. Watanabe, T. Saitoh, “Precision trench machining of optical fiber,” in Proceedings of Japan Society Precision Engineering Autumn Meeting (Japan Society of Precision Engineering, Yamagata, 1988), pp. 223–224.
  3. Y. Mori, “Elastic emission machining as evaluated by atomic technique,” in Proceedings of the 6th International Conference on Production Engineering (Japan Society of Precision Engineering, Osaka, 1987), pp. 58–63.
  4. D. Marcuse, “Loss analysis of single-mode fiber splice,” Bell Syst. Technol. J. 56, 703–718 (1977).
  5. E. Sugita, R. Nagase, K. Kanayama, T. Shintaku, “SC-type single-mode optical fiber connectors,” J. Lightwave Technol. LT-7, 1689–1696 (1989).
    [CrossRef]

1989 (1)

E. Sugita, R. Nagase, K. Kanayama, T. Shintaku, “SC-type single-mode optical fiber connectors,” J. Lightwave Technol. LT-7, 1689–1696 (1989).
[CrossRef]

1977 (1)

D. Marcuse, “Loss analysis of single-mode fiber splice,” Bell Syst. Technol. J. 56, 703–718 (1977).

Hayakawa, H.

H. Yanagawa, H. Hayakawa, T. Ochiai, S. Yano, H. Miyazawa, “Low loss in-line single-mode filter,” in Optical Fiber Communication, Vol. 1 of OSA 1990 Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper TUG3.

Kanayama, K.

E. Sugita, R. Nagase, K. Kanayama, T. Shintaku, “SC-type single-mode optical fiber connectors,” J. Lightwave Technol. LT-7, 1689–1696 (1989).
[CrossRef]

Marcuse, D.

D. Marcuse, “Loss analysis of single-mode fiber splice,” Bell Syst. Technol. J. 56, 703–718 (1977).

Matsui, S.

S. Matsui, J. Watanabe, T. Saitoh, “Precision trench machining of optical fiber,” in Proceedings of Japan Society Precision Engineering Autumn Meeting (Japan Society of Precision Engineering, Yamagata, 1988), pp. 223–224.

Miyazawa, H.

H. Yanagawa, H. Hayakawa, T. Ochiai, S. Yano, H. Miyazawa, “Low loss in-line single-mode filter,” in Optical Fiber Communication, Vol. 1 of OSA 1990 Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper TUG3.

Mori, Y.

Y. Mori, “Elastic emission machining as evaluated by atomic technique,” in Proceedings of the 6th International Conference on Production Engineering (Japan Society of Precision Engineering, Osaka, 1987), pp. 58–63.

Nagase, R.

E. Sugita, R. Nagase, K. Kanayama, T. Shintaku, “SC-type single-mode optical fiber connectors,” J. Lightwave Technol. LT-7, 1689–1696 (1989).
[CrossRef]

Ochiai, T.

H. Yanagawa, H. Hayakawa, T. Ochiai, S. Yano, H. Miyazawa, “Low loss in-line single-mode filter,” in Optical Fiber Communication, Vol. 1 of OSA 1990 Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper TUG3.

Saitoh, T.

S. Matsui, J. Watanabe, T. Saitoh, “Precision trench machining of optical fiber,” in Proceedings of Japan Society Precision Engineering Autumn Meeting (Japan Society of Precision Engineering, Yamagata, 1988), pp. 223–224.

Shintaku, T.

E. Sugita, R. Nagase, K. Kanayama, T. Shintaku, “SC-type single-mode optical fiber connectors,” J. Lightwave Technol. LT-7, 1689–1696 (1989).
[CrossRef]

Sugita, E.

E. Sugita, R. Nagase, K. Kanayama, T. Shintaku, “SC-type single-mode optical fiber connectors,” J. Lightwave Technol. LT-7, 1689–1696 (1989).
[CrossRef]

Watanabe, J.

S. Matsui, J. Watanabe, T. Saitoh, “Precision trench machining of optical fiber,” in Proceedings of Japan Society Precision Engineering Autumn Meeting (Japan Society of Precision Engineering, Yamagata, 1988), pp. 223–224.

Yanagawa, H.

H. Yanagawa, H. Hayakawa, T. Ochiai, S. Yano, H. Miyazawa, “Low loss in-line single-mode filter,” in Optical Fiber Communication, Vol. 1 of OSA 1990 Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper TUG3.

Yano, S.

H. Yanagawa, H. Hayakawa, T. Ochiai, S. Yano, H. Miyazawa, “Low loss in-line single-mode filter,” in Optical Fiber Communication, Vol. 1 of OSA 1990 Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper TUG3.

Bell Syst. Technol. J. (1)

D. Marcuse, “Loss analysis of single-mode fiber splice,” Bell Syst. Technol. J. 56, 703–718 (1977).

J. Lightwave Technol. (1)

E. Sugita, R. Nagase, K. Kanayama, T. Shintaku, “SC-type single-mode optical fiber connectors,” J. Lightwave Technol. LT-7, 1689–1696 (1989).
[CrossRef]

Other (3)

H. Yanagawa, H. Hayakawa, T. Ochiai, S. Yano, H. Miyazawa, “Low loss in-line single-mode filter,” in Optical Fiber Communication, Vol. 1 of OSA 1990 Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper TUG3.

S. Matsui, J. Watanabe, T. Saitoh, “Precision trench machining of optical fiber,” in Proceedings of Japan Society Precision Engineering Autumn Meeting (Japan Society of Precision Engineering, Yamagata, 1988), pp. 223–224.

Y. Mori, “Elastic emission machining as evaluated by atomic technique,” in Proceedings of the 6th International Conference on Production Engineering (Japan Society of Precision Engineering, Osaka, 1987), pp. 58–63.

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Figures (11)

Fig. 1
Fig. 1

Schematic of the in-line microfilter.

Fig. 2
Fig. 2

Schematic of the precision machining technology. The grinding fluid contains silica powder.

Fig. 3
Fig. 3

Relation between abrasive concentration and trench width. Trenches were made with a 10-μm-thick diamond blade.

Fig. 4
Fig. 4

Photos of cut optical fiber planes taken with a Nomarski differential interference microscope: (a) with 1.3 wt. % abrasive, (b) without abrasive.

Fig. 5
Fig. 5

Surface roughness measured with a Talystep profilometer: (a) with 1.3-wt. % silica abrasive, (b) without abrasive.

Fig. 6
Fig. 6

Relation between wavelength and insertion loss for a 14-μm-wide trench cut with 1.3-wt. % abrasive. The trench was filled with index-matched oil.

Fig. 7
Fig. 7

Relation between insertion loss and trench width. The trenches were filled with index-matched oil.

Fig. 8
Fig. 8

Photos of fiber edge planes covered with index-matched oil. The cut optical fiber planes (same as Fig. 4) were covered with index-matched oil. The focal planes are set to fiber surfaces: (a) with 1.3-wt. % abrasive, (b) without abrasive.

Fig. 9
Fig. 9

Relation between wavelength and insertion loss for a 14-μm-wide trench cut with 1.3-wt. % abrasive. The trench was filled with index-matched oil.

Fig. 10
Fig. 10

Relation between insertion loss and trench width for air gap.

Fig. 11
Fig. 11

Loss characteristics of microfilter. The thickness of filter plates is 15 μm.

Equations (1)

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loss ( dB ) = 10 log [ 1 1 + λ z / ( 2 π n w 2 ) ]

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