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Mismatch Consideration in Circular Core Mono-mode Graded Index Fiber of Triangular Refractive Index Profile Excitation via Hemispherical Microlens on the Fiber Tip
-
Ashima Bose
and
Subhas Chandra Saha
Published/Copyright:
December 13, 2012
Abstract
We report what, as per our knowledge, is the first theoretical investigation of the excitation efficiency in presence of possible transverse and angular misalignments in case of single-mode circular core triangular refractive index profile fiber excitation by laser diode via hemispherical microlens on the fiber tip. The present analysis takes into consideration limited aperture allowable by the hemispherical lens. Using ABCD matrix for refraction of paraxial rays by a hemispherical microlens, we prescribe analytical expressions for the coupling efficiencies in presence of the said mismatches. The evaluation of the concerned efficiencies and associated losses will require little computations. The results found will be extremely useful in the field of optimum launch optics involving such coupler.
Keywords: laser diode; hemispherical microlens; circular core single-mode graded index fiber of triangular refractive index profile; optical coupling; coupling losses in misalignments
Received: 2012-05-07
Accepted: 2012-09-13
Published Online: 2012-12-13
Published in Print: 2012-12-14
©[2012] by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Masthead
- Performance of Fiber Raman Amplifier due to Change in Refractive Index of Second Core of Dual Core Fiber Raman Amplifier
- Design of FBG En/decoders in Coherent 2-D Time-polarization OCDMA Systems
- Simple Method for Study of Single-mode Dispersion-shifted and Dispersion-flattened Fibers
- Spectroscopic Properties of Tm3+/Yb3+-Codoped Tellurite Material
- Application of Raman Amplification using a Reflector in Passive Optical Networks
- An Approach of Multiple-Quality Segment Protection Based on p-Cycle for the Optical Multicast
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- PMD Mitigation by Various Distribution Patterns of Fast Polarization Scramblers with Forward Error Correction
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