Radiation losses in a periodically deformed single-mode fiber

• Published in: Journal of lightwave technology Vol. 5; no. 1; pp. 163 - 173
• Main Authors: Wlodarczyk, M., Seshadri, S.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.01.1987; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Circuit properties; Dielectrics; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Integrated optics. Optical fibers and wave guides; Light scattering; Light sources; Optical and optoelectronic circuits; Optical fiber communication; Optical fiber losses; Optical fiber polarization; Optical fiber sensors; Optical fiber theory; Optical fibers; Space technology; Radiations; Energy loss; Single mode waveguide; Microbending; Deformation; Refraction index; Optical waveguide; Optical fiber; Step function
• ISSN: 0733-8724
• DOI: 10.1109/JLT.1987.1075404

Scattering of the fundamental mode on a step-index fiber subject to microbendings is considered. An analytical technique is developed which is applicable to fibers with arbitrary numerical apertures, large deformation periods, and radiation escaping at arbitrary angles to the fiber axis. Low and high radiation orders are compared as a function of the length of deformation period. In the case of a fiber deformed by corrugated plates, the maximum radiation loss associated with the fundamental spatial harmonic of a microbending structure with a given period is equal to the maximum radiation loss associated with the nth spatial harmonic of the microbending structure with a period n times longer. Unlike in multimode fibers, microbending losses in single-mode fibers depend strongly on the wavelength of the light source. It is found that these losses vary critically with core radius. The scattered radiation is almost equally composed of the TE and TM polarized waves.