Machined InP immersion grating available in Y-band

Takashi Sukegawa; Yukinobu Okura

doi:10.1117/12.2628908

29 August 2022 Machined InP immersion grating available in Y-band

Takashi Sukegawa, Yukinobu Okura

Proceedings Volume 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V; 1218858 (2022) https://doi.org/10.1117/12.2628908
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The immersion grating has become a very effective device in infrared spectroscopy not only to achieve high dispersion but also to achieve diffraction limit. The InP immersion grating produced by this material and excellent cutting technology is shorter in wavelength and more practical than the initial InP immersion grating and can completely cover the range covered by the Silicon immersion grating. We have already reported an InP immersion grating that can cover the full J-band in 2020¹. In this study, we have confirmed that the diffraction efficiency is over 70% in absolute efficiency even at 1.015 μm to confirm the practicality in Y-band. Therefore, ZnSe was the only practical material in this wavelength band, but we confirmed that InP with a refractive index of 3.2 can be used.

Citation Download Citation

Takashi Sukegawa and Yukinobu Okura "Machined InP immersion grating available in Y-band", Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V, 1218858 (29 August 2022); https://doi.org/10.1117/12.2628908

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