Abstract
Summary form only given. The present research work is devoted to the realization of an efficient optical coupling between single-mode fiber and rectangular waveguide. The outcoming laser beam exiting from the fiber has a gaussian transversal field distribution. On the contrary, the single-mode waveguide has an asymmetric transversal field distribution in X and Y-axis. The problem of transforming the outcoming circular laser beam onto a rectangular, size adjusted, spot can be solved realizing directly on the top of the fiber a diffractive optical element. This optic element is able to redistribute the diffractive electromagnetic field on a selected area by a suitable phase modulation of the light, in analogy with what happens for Fresnel zone plate lenses. Phase modulation is obtained by a multilevel profiling of a polymeric material coating the top of the fiber by means of e-beam lithography. The design of diffractive optical elements has been realized using our own algorithm and code. Focalization experiments have been made with the use of a 1550nm wavelength laser. Description of the lithography and fabrication processes are shown as well.
Original language | English (US) |
---|---|
Title of host publication | 2002 International Microprocesses and Nanotechnology Conference, MNC 2002 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 46-47 |
Number of pages | 2 |
ISBN (Electronic) | 4891140313, 9784891140311 |
DOIs | |
State | Published - 2002 |
Externally published | Yes |
Event | International Microprocesses and Nanotechnology Conference, MNC 2002 - Tokyo, Japan Duration: Nov 6 2002 → Nov 8 2002 |
Publication series
Name | 2002 International Microprocesses and Nanotechnology Conference, MNC 2002 |
---|
Other
Other | International Microprocesses and Nanotechnology Conference, MNC 2002 |
---|---|
Country/Territory | Japan |
City | Tokyo |
Period | 11/6/02 → 11/8/02 |
Bibliographical note
Publisher Copyright:© 2002 IEEE.
ASJC Scopus subject areas
- Hardware and Architecture
- Electrical and Electronic Engineering