A single-mode Echelle spectrograph: eliminating modal variation, enabling higher precision Doppler study

Askari Ghasempour; John Kelly; Matthew W. Muterspaugh; Michael H. Williamson

doi:10.1117/12.925031

13 September 2012 A single-mode Echelle spectrograph: eliminating modal variation, enabling higher precision Doppler study

Askari Ghasempour, John Kelly, Matthew W. Muterspaugh, Michael H. Williamson

Author Affiliations +

Proceedings Volume 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II; 845045 (2012) https://doi.org/10.1117/12.925031
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

An innovative compact - yet high resolution - cross-dispersed echelle spectrograph has been designed, built, and deployed at TSU's 2-meter robotic telescope for initial tests and commissioning. This design is based on a single mode fiber (SMF) and it eliminates mode noise in fiber-fed spectrographs which is important for m/s precision exoplanet Doppler searches. The use of SMFs removes modal variation, makes the design compact and the camera focus slow and stable at the price of lower throughput. This can be improved by using adaptive optics or by placing it in space; the compact design is well suited for such deployment.

Citation Download Citation

Askari Ghasempour, John Kelly, Matthew W. Muterspaugh, and Michael H. Williamson "A single-mode Echelle spectrograph: eliminating modal variation, enabling higher precision Doppler study", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 845045 (13 September 2012); https://doi.org/10.1117/12.925031

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