THz metrology with monolithic tunable two-color diode lasers

Martin R. Hofmann; Nils Surkamp; Alexandra Gerling; James O'Gorman; Martin Honsberg; Sebastian Schmidtmann; Uttam Nandi; Sascha Preu; Joachim Sacher; Carsten Brenner

doi:10.1117/12.2626219

31 May 2022 THz metrology with monolithic tunable two-color diode lasers

Martin R. Hofmann, Nils Surkamp, Alexandra Gerling, James O'Gorman, Martin Honsberg, Sebastian Schmidtmann, Uttam Nandi, Sascha Preu, Joachim Sacher, Carsten Brenner

Author Affiliations +

Proceedings Volume 12134, Terahertz Photonics II; 1213408 (2022) https://doi.org/10.1117/12.2626219
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

We use a slotted Y-branch Laser for Terahertz thickness measurements of high resistive float zone silicon wafers of different thicknesses. The laser provides two-color emission in the 1550 nm region with an optical beat frequency of 1 THz. It is used as a photonic source for thickness measurements of high resistive silicon wafers with continuous wave Terahertz radiation. Frequency tuning is obtained through segment current tuning of the individual branches. We determine the sample´s refractive index and thickness by MSE fitting of the theoretical etalon transmission to the experimental results without additional knowledge.

Conference Presentation

Citation Download Citation

Martin R. Hofmann, Nils Surkamp, Alexandra Gerling, James O'Gorman, Martin Honsberg, Sebastian Schmidtmann, Uttam Nandi, Sascha Preu, Joachim Sacher, and Carsten Brenner "THz metrology with monolithic tunable two-color diode lasers", Proc. SPIE 12134, Terahertz Photonics II, 1213408 (31 May 2022); https://doi.org/10.1117/12.2626219

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