Effect of wavelength change in microholographic recording

Ryuichi Katayama

doi:10.1117/12.2238531

8 September 2016 Effect of wavelength change in microholographic recording

Ryuichi Katayama

Proceedings Volume 9959, Optical Data Storage 2016; 995905 (2016) https://doi.org/10.1117/12.2238531
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

Abstract

In microholographic recording, expensive laser diodes having no spectrum broadening (single mode) and no wavelength variation are used. On the other hand, in conventional optical disk systems, cheap laser diodes having spectrum broadening (multimode) and wavelength variation are used. It is a great advantage if the laser diodes for conventional optical disk systems can be used for microholographic recording. Therefore, the effect of wavelength change in microholographic recording was investigated through a numerical simulation. The laser diodes were modeled so that the full width at 1/e2 maximum of the spectrum was 0.8 nm and the center wavelength was 405 nm. The numerical aperture of the objective lenses was 0.85 and the thickness of the recording medium was 300 μm. The diffraction efficiency of the diffracted beam from a microhologram was calculated using the coupled wave theory and the following results were obtained. The diffraction efficiency decreased by three orders of magnitude by replacing single-mode laser diodes with multimode laser diodes, which makes it necessary to enhance the readout signal. The tolerance of the optical path length difference between the signal and reference beams was -50 ~ 110 μm, which makes it necessary to adjust the optical path length difference. The tolerance of the wavelength variation was 405 ± 0.5 nm, which makes it necessary to select the laser diodes. The conclusion was that it is not practical to use the laser diodes for conventional optical disk systems for microholographic recording.

Citation Download Citation

Ryuichi Katayama "Effect of wavelength change in microholographic recording", Proc. SPIE 9959, Optical Data Storage 2016, 995905 (8 September 2016); https://doi.org/10.1117/12.2238531

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
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Semiconductor lasers

Diffraction

Optical discs

Tolerancing

Beam splitters

Refractive index

Visibility

Show All Keywords

Keywords/Phrases

Search In:

Publication Years