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

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

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

Author(s) -

Askari Ghasempour,

John G. Kelly,

Matthew W. Muterspaugh,

Michael H. Williamson

Publication year - 2012

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.925031

Subject(s) - spectrograph , optics , exoplanet , telescope , adaptive optics , doppler effect , computer science , modal , throughput , single mode optical fiber , focus (optics) , optical fiber , physics , telecommunications , materials science , planet , astronomy , polymer chemistry , wireless , spectral line

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.

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