Fabrication and evaluation results of a micro elliptical collimator lens for a beam shape form of laser diode

K. Okada; F. Oohira; M. Hosogi; G. Hashiguchi; Y. Mihara; K. Ogawa

doi:10.1117/12.648818

7 December 2005 Fabrication and evaluation results of a micro elliptical collimator lens for a beam shape form of laser diode

K. Okada, F. Oohira, M. Hosogi, G. Hashiguchi, Y. Mihara, K. Ogawa

Author Affiliations +

Proceedings Volume 6050, Optomechatronic Micro/Nano Devices and Components; 605005 (2005) https://doi.org/10.1117/12.648818
Event: Optomechatronic Technologies 2005, 2005, Sapporo, Japan

Abstract

This paper describes a new fabrication process of a micro elliptical collimator lens to form a beam shape for LD(Laser Diode), and the evaluation results of the optical characteristic for this lens. Beam shape of LD is an ellipse because divergent light angle is different between horizontal and vertical direction, which increases a coupling loss with an optical fiber. In this presentation, we propose the lens to form the divergent light of an elliptical beam shape to the collimated light of a circular beam shape. This lens makes it possible to reduce the coupling loss with the optical fiber. For this purpose, we designed one lens, which has different curvature radiuses between incident and output surfaces. In the incident surface, the divergent light is formed to the convergent light, and in the output surface, the convergent light is formed to the collimated light. We simulated the optical characteristic of this lens, and designed for various parameters. In order to fabricate this lens, we propose a new process using a chemically absorbed monomolecular layer, which has an excellent hydrophobic property. This layer is patterned and deposited by a photolithographic technique. Next, we drop a UV(Ultra Violet) cure material on the hydrophilic area, as the result, we can fabricate a micro elliptical lens shape. The curvature radius of this lens can be controlled by the amount of a dropped UV cure material and an elliptical pattern size in horizontal and vertical direction. The formed lens shapes are transferred by the electro-plating and then the micro dies are fabricated. And they are used for molding the plastic lens.

Citation Download Citation

K. Okada, F. Oohira, M. Hosogi, G. Hashiguchi, Y. Mihara, and K. Ogawa "Fabrication and evaluation results of a micro elliptical collimator lens for a beam shape form of laser diode", Proc. SPIE 6050, Optomechatronic Micro/Nano Devices and Components, 605005 (7 December 2005); https://doi.org/10.1117/12.648818

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available