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

Journal Article · Tue Dec 15 04:00:00 EST 2015 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4936971· OSTI ID:22482628

Mandula, Gábor; Kis, Zsolt; Lengyel, Krisztián ^[1]

---

1. Wigner Research Centre for Physics of the Hungarian Academy of Sciences, Konkoly-Thege Miklós út 29-33, H-1121 Budapest (Hungary)

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.

• OSTI ID: 22482628
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 12 Vol. 86; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CALIBRATION
DIFFRACTION GRATINGS
GEOMETRY
INTERFEROMETERS
LASER CAVITIES
LASERS
LENGTH
MIRRORS
RESONATORS
SPHERICAL CONFIGURATION