Formation and power distribution properties of an upside down taper lens at the end of an optical fiber
✍ Scribed by L.B. Yuan; R.L. Shou
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 197 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0924-4247
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✦ Synopsis
A study has been made of the use of a CO 2 laser for producing an upside down taper lens at the end of a fiber. When the fiber end is heated to the softening point of the material, it tends to become an upside down taper lens (UDTL) inside a shape mould due to the inside and surface tension. A one-dimensional heat-conduction model for the fiber can reasonably predict the required light energy intensity needed to produce a UDTL on fibers. A general source of non-coherent light and the coherent light of a He-Ne laser beam were coupled into a fiber to investigate the properties of the UDTL, and the optical field power distributions from a fiber end with a UDTL and a general cut fiber end. The results show that the convergence of optical energy at the UDTL end is better than with general cut ends.