Theory of lasing resonators: quality factor and line width

Markus Pollnau; M. Hammer; M. Eichhorn

Theory of lasing resonators: quality factor and line width

Markus Pollnau, M. Hammer (Editor), M. Eichhorn

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Abstract

This paper defines the quality factor of a continuous-wave laser and relates it to the laser line width. By systematically including spontaneous emission into the calculation, we show that the Q-factor of a lasing resonator is finite, because the gain becomes smaller than the losses and, consequently, any coherent state inside the laser resonator decays with half the coherence time of the emitted laser light. The Schawlow-Townes line width of a laser is then straight-forwardly derived.

Original language	Undefined
Pages	Paper O-2.1
Number of pages	1
Publication status	Published - Apr 2013
Event	21st International Workshop on Optical Wave & Waveguide Theory and Numerical Modelling, OWTNM 2013 - University of Twente, Enschede, Netherlands Duration: 19 Apr 2013 → 20 Apr 2013 Conference number: 21 https://www.owtnm-workshop.org/

Conference

Conference	21st International Workshop on Optical Wave & Waveguide Theory and Numerical Modelling, OWTNM 2013
Abbreviated title	OWTNM
Country/Territory	Netherlands
City	Enschede
Period	19/04/13 → 20/04/13
Internet address	https://www.owtnm-workshop.org/

Keywords

METIS-295732
EWI-23311
IOMS-APD: Active Photonic Devices
IR-85837

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Cite this

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title = "Theory of lasing resonators: quality factor and line width",

abstract = "This paper defines the quality factor of a continuous-wave laser and relates it to the laser line width. By systematically including spontaneous emission into the calculation, we show that the Q-factor of a lasing resonator is finite, because the gain becomes smaller than the losses and, consequently, any coherent state inside the laser resonator decays with half the coherence time of the emitted laser light. The Schawlow-Townes line width of a laser is then straight-forwardly derived.",

keywords = "METIS-295732, EWI-23311, IOMS-APD: Active Photonic Devices, IR-85837",

author = "Markus Pollnau and M. Hammer and M. Eichhorn",

year = "2013",

month = apr,

language = "Undefined",

pages = "Paper O--2.1",

note = "21st International Workshop on Optical Wave & Waveguide Theory and Numerical Modelling, OWTNM 2013 ; Conference date: 19-04-2013 Through 20-04-2013",

url = "https://www.owtnm-workshop.org/",

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TY - CONF

T1 - Theory of lasing resonators: quality factor and line width

AU - Pollnau, Markus

AU - Eichhorn, M.

A2 - Hammer, M.

N1 - Conference code: 21

PY - 2013/4

Y1 - 2013/4

N2 - This paper defines the quality factor of a continuous-wave laser and relates it to the laser line width. By systematically including spontaneous emission into the calculation, we show that the Q-factor of a lasing resonator is finite, because the gain becomes smaller than the losses and, consequently, any coherent state inside the laser resonator decays with half the coherence time of the emitted laser light. The Schawlow-Townes line width of a laser is then straight-forwardly derived.

AB - This paper defines the quality factor of a continuous-wave laser and relates it to the laser line width. By systematically including spontaneous emission into the calculation, we show that the Q-factor of a lasing resonator is finite, because the gain becomes smaller than the losses and, consequently, any coherent state inside the laser resonator decays with half the coherence time of the emitted laser light. The Schawlow-Townes line width of a laser is then straight-forwardly derived.

KW - METIS-295732

KW - EWI-23311

KW - IOMS-APD: Active Photonic Devices

KW - IR-85837

M3 - Abstract

SP - Paper O-2.1

T2 - 21st International Workshop on Optical Wave & Waveguide Theory and Numerical Modelling, OWTNM 2013

Y2 - 19 April 2013 through 20 April 2013

ER -