Real-time dynamic calibration of a tunable frequency laser source using a Fabry-Pérot interferometer

Gábor Mandula, Zsolt Kis, Krisztián Lengyel

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report on a method for real-time dynamic calibration of a tunable external cavity diode laser by using a partially mode-matched plano-concave Fabry-Pérot interferometer in reflection geometry. Wide range laser frequency scanning is carried out by piezo-driven tilting of a diffractive grating playing the role of a frequency selective mirror in the laser cavity. The grating tilting system has a considerable mechanical inertness, so static laser frequency calibration leads to false results. The proposed real-time dynamic calibration based on the identification of primary- and Gouy-effect type secondary interference peaks with known frequency and temporal history can be used for a wide scanning range (from 0.2 GHz to more than 1 GHz). A concave spherical mirror with a radius of R = 100 cm and a plain 1% transmitting mirror was used as a Fabry-Pérot interferometer with various resonator lengths to investigate and demonstrate real-time calibration procedures for two kinds of laser frequency scanning functions.

Original languageEnglish
Article number123104
JournalReview of Scientific Instruments
Volume86
Issue number12
DOIs
Publication statusPublished - Dec 1 2015

ASJC Scopus subject areas

  • Instrumentation

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