Spectral, spatial and temporal control of high-power diode lasers through nonlinear optical feedback

Peter Danny van Voorst

Research output: ThesisPhD Thesis - Research UT, graduation UTAcademic

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Abstract

A high-power diode laser offers multi-Watt output power from a small and efficient device, which makes them an interesting source for numerous applications. The spatial and spectral output however, are of reduced quality which limits the applicability. This limited quality is connected to the design aiming at high power. The optical power limit achievable by a single-mode element is approximately 100 mW, limited by damage to the end-face of the diode. Scaling to higher power often is usually achieved by increasing the transverse size of the diode laser waveguide. These lasers are called Broad Area diode Lasers (BAL). The broad amplification region supports a number of transverse modes while the broad spectral gain supports oscillation at many longitudinal frequencies. The output therefore consists ofmany modes in space and frequency. These modes compete for gain and connect through nonlinear effects. The exact superposition of modes emitted at any time depends on many parameters such as the precise dimensions of the waveguide, temperature distribution in the gain region, spatial profile of pump current. The output profile is therefore hard to predict, unstable and changes as the diode ages.
Original languageEnglish
Awarding Institution
  • University of Twente
Supervisors/Advisors
  • Boller, K.-J., Supervisor
  • Offerhaus, Herman, Co-Supervisor
Award date25 Jan 2008
Place of PublicationEnschede
Publisher
Print ISBNs978-90-365-2597-8
Publication statusPublished - 25 Jan 2008

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semiconductor lasers
output
waveguide lasers
profiles
temperature distribution
pumps
damage
waveguides
scaling
oscillations
lasers

Keywords

  • IR-58236

Cite this

van Voorst, Peter Danny. / Spectral, spatial and temporal control of high-power diode lasers through nonlinear optical feedback. Enschede : University of Twente, 2008. 146 p.
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abstract = "A high-power diode laser offers multi-Watt output power from a small and efficient device, which makes them an interesting source for numerous applications. The spatial and spectral output however, are of reduced quality which limits the applicability. This limited quality is connected to the design aiming at high power. The optical power limit achievable by a single-mode element is approximately 100 mW, limited by damage to the end-face of the diode. Scaling to higher power often is usually achieved by increasing the transverse size of the diode laser waveguide. These lasers are called Broad Area diode Lasers (BAL). The broad amplification region supports a number of transverse modes while the broad spectral gain supports oscillation at many longitudinal frequencies. The output therefore consists ofmany modes in space and frequency. These modes compete for gain and connect through nonlinear effects. The exact superposition of modes emitted at any time depends on many parameters such as the precise dimensions of the waveguide, temperature distribution in the gain region, spatial profile of pump current. The output profile is therefore hard to predict, unstable and changes as the diode ages.",
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Spectral, spatial and temporal control of high-power diode lasers through nonlinear optical feedback. / van Voorst, Peter Danny.

Enschede : University of Twente, 2008. 146 p.

Research output: ThesisPhD Thesis - Research UT, graduation UTAcademic

TY - THES

T1 - Spectral, spatial and temporal control of high-power diode lasers through nonlinear optical feedback

AU - van Voorst, Peter Danny

PY - 2008/1/25

Y1 - 2008/1/25

N2 - A high-power diode laser offers multi-Watt output power from a small and efficient device, which makes them an interesting source for numerous applications. The spatial and spectral output however, are of reduced quality which limits the applicability. This limited quality is connected to the design aiming at high power. The optical power limit achievable by a single-mode element is approximately 100 mW, limited by damage to the end-face of the diode. Scaling to higher power often is usually achieved by increasing the transverse size of the diode laser waveguide. These lasers are called Broad Area diode Lasers (BAL). The broad amplification region supports a number of transverse modes while the broad spectral gain supports oscillation at many longitudinal frequencies. The output therefore consists ofmany modes in space and frequency. These modes compete for gain and connect through nonlinear effects. The exact superposition of modes emitted at any time depends on many parameters such as the precise dimensions of the waveguide, temperature distribution in the gain region, spatial profile of pump current. The output profile is therefore hard to predict, unstable and changes as the diode ages.

AB - A high-power diode laser offers multi-Watt output power from a small and efficient device, which makes them an interesting source for numerous applications. The spatial and spectral output however, are of reduced quality which limits the applicability. This limited quality is connected to the design aiming at high power. The optical power limit achievable by a single-mode element is approximately 100 mW, limited by damage to the end-face of the diode. Scaling to higher power often is usually achieved by increasing the transverse size of the diode laser waveguide. These lasers are called Broad Area diode Lasers (BAL). The broad amplification region supports a number of transverse modes while the broad spectral gain supports oscillation at many longitudinal frequencies. The output therefore consists ofmany modes in space and frequency. These modes compete for gain and connect through nonlinear effects. The exact superposition of modes emitted at any time depends on many parameters such as the precise dimensions of the waveguide, temperature distribution in the gain region, spatial profile of pump current. The output profile is therefore hard to predict, unstable and changes as the diode ages.

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M3 - PhD Thesis - Research UT, graduation UT

SN - 978-90-365-2597-8

PB - University of Twente

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