Optical pickup head reproduced signal from the pits on a disc affected by the beam divergence of the laser beam radiated from a semiconductor laser

Kenji Fukui; Ji Ping Tiang; Kenji Murakami

doi:10.1117/12.479649

16 August 2002 Optical pickup head reproduced signal from the pits on a disc affected by the beam divergence of the laser beam radiated from a semiconductor laser

Kenji Fukui, Ji Ping Tiang, Kenji Murakami

Author Affiliations +

Proceedings Volume 4775, Modeling and Characterization of Light Sources; (2002) https://doi.org/10.1117/12.479649
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

The divergence of the laser beam radiated from a light source affects the resolving power of the optical pickup head. The high power semiconductor laser does not have Gaussian light intensity distribution, which can be easily proved by scanning the photo-detector in two directions. The optical resolving performance is directly measured by using the so-called Target Chip, which consists of gratings with different spatial frequencies ranging from 555 up to 1667 lines per millimeter on the synthesized quartz substrate, sputtered with aluminum forming a 70% reflective layer. The line depths of the gratings are constant at 0.1 micrometers and the line widths are 0.3 micrometers. The pickup head to be tested is situated on a table and light is focused on the grating through the substrate. The motion of the chip generates the corresponding output signal from the pickup head. This demonstrates the relationship between the divergence from the light source and the resolving power.

Citation Download Citation

Kenji Fukui, Ji Ping Tiang, and Kenji Murakami "Optical pickup head reproduced signal from the pits on a disc affected by the beam divergence of the laser beam radiated from a semiconductor laser", Proc. SPIE 4775, Modeling and Characterization of Light Sources, (16 August 2002); https://doi.org/10.1117/12.479649

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Head

Semiconductor lasers

Spectral resolution

Light sources

Spatial frequencies

Data modeling

Objectives

Show All Keywords

Keywords/Phrases

Search In:

Publication Years