OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 13, Iss. 11 — Nov. 1, 1974
  • pp: 2518–2521

Loss Measurements in Optical Fibers. 1: Sensitivity Limit of Bolometric Techniques

R. L. Cohen  »View Author Affiliations


Applied Optics, Vol. 13, Issue 11, pp. 2518-2521 (1974)
http://dx.doi.org/10.1364/AO.13.002518


View Full Text Article

Enhanced HTML    Acrobat PDF (740 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

A new technique for measuring the attenuation of light in clad fibers is discussed. The basic approach is to measure the temperature rise produced in the fiber by the absorption of the light. Calculations indicate that the theoretical limit of sensitivity, which should be approachable with a relatively simple experimental configuration, is a loss of about 2.5 × 10−7/cm with 1 mW of light power and a 1-cm long sample. The theoretical sensitivity limit should improve with the square root of the sample length. A variation of the basic approach, which may make it possible to monitor attenuation in fibers as they are being drawn, is also discussed.

© 1974 Optical Society of America

History
Original Manuscript: February 21, 1974
Published: November 1, 1974

Citation
R. L. Cohen, "Loss Measurements in Optical Fibers. 1: Sensitivity Limit of Bolometric Techniques," Appl. Opt. 13, 2518-2521 (1974)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-13-11-2518


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. H.-H. Witte, Appl. Apt. 11, 777 (1972). [CrossRef]
  2. D. A. Pinnow, T. C. Rich, Appl. Opt. 12, 984 (1973). [CrossRef] [PubMed]
  3. A. R. Tynes, Bell Lab. Rec. 50, 302 (1972); D. B. Keck, P. C. Schultz, F. Zimar, Appl. Phys. Lett. 21, 215 (1972). [CrossRef]
  4. D. A. Pinnow, T. C. Rich, Appl. Opt. 13, 1376 (1974). [CrossRef] [PubMed]
  5. P. Kaiser, H. W. Astle, J. Opt. Soc. Am. 64, 469 (1974). [CrossRef]
  6. We assume that the EM field of the propagating light is well enough confined to the core that the metallization will not affect the transmission. This condition is not completely fulfilled for fiber dimensions now being tested. An accompanying article [R. L. Cohen, K. W. West, P. D. Lazay, J. Simpson, Appl. Opt. 13, 2522 (1974)] discusses simple alternatives to the metallization approach that have been used successfully for loss measurements. [CrossRef] [PubMed]
  7. Light loss by absorption will result directly in a rise in fiber temperature; light lost from the core by scattering mechanisms should be very rapidly absorbed by repeated reflection at the cladding-metal interface, where the reflectivity will be only ≈0.7. Thus, all light lost from the propagating core mode will result in heating of the fiber and be measured.
  8. Due to the small diameter and low thermal conductivity of glass fibers, the longitudinal heat conductivity is very small compared to the loss of heat by radiation, even when the sample length is only a few cm. Thus, end effects are negligible.
  9. The emissivity of pure nickel films is low, but can be improved either by overcoating the film with a black material or by chemical processing.
  10. See, e.g., L. B. Kreuzer, J. Appl. Phys. 42, 2934 (1971) and; W. R. Harshbarger, M. B. Robin, Acc. Chem. Res. 6, 329 (1973). [CrossRef]
  11. R. L. Cohen, K. W. West, to be published.

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

Figures

Fig. 1 Fig. 2 Fig. 3
 

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited