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Applied Optics

Applied Optics


  • Vol. 17, Iss. 4 — Feb. 15, 1978
  • pp: 642–645

Measurement of loss and output numerical aperture of optical fiber splices

A. H. Cherin and P. J. Rich  »View Author Affiliations

Applied Optics, Vol. 17, Issue 4, pp. 642-645 (1978)

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An ensemble of optical fiber splices has been evaluated to determine how source launching conditions and length of fiber between the source, splice, and detector affect the splice loss and far field output NA. The loss of a splice is strongly dependent upon the energy distribution and NA of the beam at the input of the splice. For the range of NA's considered, the splice loss varied by 0.5 dB. The average NA at the output of the ensemble of splices was greater than its corresponding input NA by as much as 12%. The splice appears to act as a transformer converting the input energy distribution into one at the output that contains a greater amount of its energy in higher order modes. As a consequence of this, the loss of a fiber following the splice in a long transmission path is greater than the loss the fiber would exhibit if measured with steady state excitation conditions.

© 1978 Optical Society of America

Original Manuscript: July 1, 1977
Published: February 15, 1978

A. H. Cherin and P. J. Rich, "Measurement of loss and output numerical aperture of optical fiber splices," Appl. Opt. 17, 642-645 (1978)

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  1. C. M. Miller, Bell Syst. Tech. J. 55, 917 (1976).
  2. D. Gloge, Bell Syst. Tech. J. 55, 905 (1976).
  3. T. C. Chu, Bell Laboratories;“Measurements of Loss Due to Offsets and End Separations of Graded Index Fibers Excited by an Incoherent Source,” unpublished work.
  4. G. Fishman, Bell Laboratories; “Optical Fiber Splices. 3: Effect of Diameter Difference and Transverse Offset on Splice Loss,” unpublished work.
  5. A. H. Cherin, P. J. Rich, in Digest of Topical Meeting on Optical Fiber Transmission: 2 (Optical Society of America, Washington, D. C., 1977).
  6. P. J. Rich, A. H. Cherin, BTL; “A Test Set for Measuring the Numerical Aperture of Optical Fibers,” unpublished work.
  7. A. H. Cherin, “A Vacuum Assisted Plastic Splice for Joining Optical Fiber Ribbons,” to be published.
  8. M. J. Buckler, L. Wilson, in Ref. 5.
  9. M. J. Adams, D. N. Payne, F. M. E. Sladen, Appl. Phys. Lett. 28, 524 (1976). [CrossRef]

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