Publication

Laser linewidth determination in the sub-Megahertz range using a Brillouin fibre laser

Luc Thévenaz
1996
Conference Papers

Abstract

The Brillouin fibre laser has experimentally demonstrated its suitability for the measurement of laser linewidth in the 1 kHz to 500 kHz frequency range. A major advantage of this system is to be widely independent of the source wavelength by generating the uncorrelated reference signal at a fixed frequency below the source under test. This solution is simple and affordable, since it only requires widely available standard optical supplies. The measured spectra of a compact diode-pumped Nd:YAG laser and a spectrally-narrowed semiconductor laser are shown

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https://infoscience.epfl.ch/entities/publication/3cb3336f-717e-4e64-8fde-c6602a5bf0e9

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Luc Thévenaz
1996
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/3cb3336f-717e-4e64-8fde-c6602a5bf0e9

About this result

Related concepts (32)

Laser linewidth

Laser linewidth is the spectral linewidth of a laser beam. Two of the most distinctive characteristics of laser emission are spatial coherence and spectral coherence. While spatial coherence is related to the beam divergence of the laser, spectral coherence is evaluated by measuring the linewidth of laser radiation. The first human-made coherent light source was a maser. The acronym MASER stands for "Microwave Amplification by Stimulated Emission of Radiation". More precisely, it was the ammonia maser operating at 12.

Laser diode

A laser diode (LD, also injection laser diode or ILD, or diode laser) is a semiconductor device similar to a light-emitting diode in which a diode pumped directly with electrical current can create lasing conditions at the diode's junction. Driven by voltage, the doped p–n-transition allows for recombination of an electron with a hole. Due to the drop of the electron from a higher energy level to a lower one, radiation, in the form of an emitted photon is generated. This is spontaneous emission.

Laser

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word laser is an anacronym that originated as an acronym for light amplification by stimulated emission of radiation. The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories, based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light that is coherent.

Related publications (8)

Laser linewidth determination in the sub-Megahertz range using a Brillouin fibre laser

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