Advanced applications of wavelength tunable lasers in metrology and fundamental physics

Ville Ahtee

Research output: ThesisDissertationCollection of Articles

Abstract

In this thesis, measurement systems based on wavelength tunable lasers have been developed and studied to improve measurement capabilities in the fields of optical metrology and quantum optics. In the first work presented in this thesis, techniques for precision measurements of absolute spectral irradiance responsivity of detectors were investigated. Two laser-based methods and a traditional monochromator based method were compared in the near infrared wavelength region. The results between absolute responsivity measurements using the three different measurement systems demonstrated agreement at the uncertainty level of less than 0.1 % (k = 1). The second work consists of an acetylene-stabilized laser and an optical single-frequency synthesizer that were constructed and characterized for precision optical frequency measurements at telecommunication wavelengths. The acetylene-stabilized laser was designed by taking a fiber-based approach, which enabled a relatively straightforward implementation of the optical set-up. The frequency of the stabilized-laser was measured absolutely using an optical frequency comb generator. The results agree well with the recommendation by the International Committee for Weights and Measures (CIPM). The single-frequency synthesizer was designed for generating a single user-specified frequency from an atomic time base within the 192–196 THz gain bandwidth of an erbium-doped fiber amplifier (EDFA). The synthesizer was utilized for studying spectral lineshapes of acetylene transitions near 1540 nm. The recorded spectra were investigated by theoretical fits and the obtained line-center frequencies were compared to line-center frequencies measured with the acetylene-stabilized laser using the third harmonic technique. The results agreed well with each other. Final part of the thesis describes a set-up that is capable of emitting indistinguishable single photons using single molecules as photon sources. This was achieved by combining high resolution laser spectroscopy and optical microscopy at cryogenic conditions. Two single molecules in separate microscopes were identified and DC-Stark effect was exploited to shift the resonance frequencies of given molecules for perfect spectral overlap. Excitation by pulsed laser enabled triggered generation of identical single photons from two independent single molecules. The results can be utilized in the development of a number of different quantum information processing schemes.
Original languageEnglish
QualificationDoctor Degree
Awarding Institution
  • Aalto University
Supervisors/Advisors
  • Ikonen, Erkki, Supervisor
Award date19 Nov 2010
Place of PublicationEspoo
Publisher
Print ISBNs978-952-5610-63-5
Electronic ISBNs978-952-5610-64-2
Publication statusPublished - 2010
MoE publication typeG5 Doctoral dissertation (article)

Fingerprint

tunable lasers
metrology
acetylene
physics
theses
wavelengths
frequency synthesizers
lasers
molecules
photons
synthesizers
fibers
quantum optics
frequency measurement
Stark effect
monochromators
laser spectroscopy
recommendations
irradiance
erbium

Keywords

  • wavelength tunable lasers
  • spectral irradiance
  • optical frequency measurements
  • single-photon source

Cite this

Ahtee, V. (2010). Advanced applications of wavelength tunable lasers in metrology and fundamental physics. Espoo: Centre of Metrology and Accreditation.
Ahtee, Ville. / Advanced applications of wavelength tunable lasers in metrology and fundamental physics. Espoo : Centre of Metrology and Accreditation, 2010. 71 p.
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title = "Advanced applications of wavelength tunable lasers in metrology and fundamental physics",
abstract = "In this thesis, measurement systems based on wavelength tunable lasers have been developed and studied to improve measurement capabilities in the fields of optical metrology and quantum optics. In the first work presented in this thesis, techniques for precision measurements of absolute spectral irradiance responsivity of detectors were investigated. Two laser-based methods and a traditional monochromator based method were compared in the near infrared wavelength region. The results between absolute responsivity measurements using the three different measurement systems demonstrated agreement at the uncertainty level of less than 0.1 {\%} (k = 1). The second work consists of an acetylene-stabilized laser and an optical single-frequency synthesizer that were constructed and characterized for precision optical frequency measurements at telecommunication wavelengths. The acetylene-stabilized laser was designed by taking a fiber-based approach, which enabled a relatively straightforward implementation of the optical set-up. The frequency of the stabilized-laser was measured absolutely using an optical frequency comb generator. The results agree well with the recommendation by the International Committee for Weights and Measures (CIPM). The single-frequency synthesizer was designed for generating a single user-specified frequency from an atomic time base within the 192–196 THz gain bandwidth of an erbium-doped fiber amplifier (EDFA). The synthesizer was utilized for studying spectral lineshapes of acetylene transitions near 1540 nm. The recorded spectra were investigated by theoretical fits and the obtained line-center frequencies were compared to line-center frequencies measured with the acetylene-stabilized laser using the third harmonic technique. The results agreed well with each other. Final part of the thesis describes a set-up that is capable of emitting indistinguishable single photons using single molecules as photon sources. This was achieved by combining high resolution laser spectroscopy and optical microscopy at cryogenic conditions. Two single molecules in separate microscopes were identified and DC-Stark effect was exploited to shift the resonance frequencies of given molecules for perfect spectral overlap. Excitation by pulsed laser enabled triggered generation of identical single photons from two independent single molecules. The results can be utilized in the development of a number of different quantum information processing schemes.",
keywords = "wavelength tunable lasers, spectral irradiance, optical frequency measurements, single-photon source",
author = "Ville Ahtee",
note = "Appendix 55 p.",
year = "2010",
language = "English",
isbn = "978-952-5610-63-5",
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publisher = "Centre of Metrology and Accreditation",
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Ahtee, V 2010, 'Advanced applications of wavelength tunable lasers in metrology and fundamental physics', Doctor Degree, Aalto University, Espoo.

Advanced applications of wavelength tunable lasers in metrology and fundamental physics. / Ahtee, Ville.

Espoo : Centre of Metrology and Accreditation, 2010. 71 p.

Research output: ThesisDissertationCollection of Articles

TY - THES

T1 - Advanced applications of wavelength tunable lasers in metrology and fundamental physics

AU - Ahtee, Ville

N1 - Appendix 55 p.

PY - 2010

Y1 - 2010

N2 - In this thesis, measurement systems based on wavelength tunable lasers have been developed and studied to improve measurement capabilities in the fields of optical metrology and quantum optics. In the first work presented in this thesis, techniques for precision measurements of absolute spectral irradiance responsivity of detectors were investigated. Two laser-based methods and a traditional monochromator based method were compared in the near infrared wavelength region. The results between absolute responsivity measurements using the three different measurement systems demonstrated agreement at the uncertainty level of less than 0.1 % (k = 1). The second work consists of an acetylene-stabilized laser and an optical single-frequency synthesizer that were constructed and characterized for precision optical frequency measurements at telecommunication wavelengths. The acetylene-stabilized laser was designed by taking a fiber-based approach, which enabled a relatively straightforward implementation of the optical set-up. The frequency of the stabilized-laser was measured absolutely using an optical frequency comb generator. The results agree well with the recommendation by the International Committee for Weights and Measures (CIPM). The single-frequency synthesizer was designed for generating a single user-specified frequency from an atomic time base within the 192–196 THz gain bandwidth of an erbium-doped fiber amplifier (EDFA). The synthesizer was utilized for studying spectral lineshapes of acetylene transitions near 1540 nm. The recorded spectra were investigated by theoretical fits and the obtained line-center frequencies were compared to line-center frequencies measured with the acetylene-stabilized laser using the third harmonic technique. The results agreed well with each other. Final part of the thesis describes a set-up that is capable of emitting indistinguishable single photons using single molecules as photon sources. This was achieved by combining high resolution laser spectroscopy and optical microscopy at cryogenic conditions. Two single molecules in separate microscopes were identified and DC-Stark effect was exploited to shift the resonance frequencies of given molecules for perfect spectral overlap. Excitation by pulsed laser enabled triggered generation of identical single photons from two independent single molecules. The results can be utilized in the development of a number of different quantum information processing schemes.

AB - In this thesis, measurement systems based on wavelength tunable lasers have been developed and studied to improve measurement capabilities in the fields of optical metrology and quantum optics. In the first work presented in this thesis, techniques for precision measurements of absolute spectral irradiance responsivity of detectors were investigated. Two laser-based methods and a traditional monochromator based method were compared in the near infrared wavelength region. The results between absolute responsivity measurements using the three different measurement systems demonstrated agreement at the uncertainty level of less than 0.1 % (k = 1). The second work consists of an acetylene-stabilized laser and an optical single-frequency synthesizer that were constructed and characterized for precision optical frequency measurements at telecommunication wavelengths. The acetylene-stabilized laser was designed by taking a fiber-based approach, which enabled a relatively straightforward implementation of the optical set-up. The frequency of the stabilized-laser was measured absolutely using an optical frequency comb generator. The results agree well with the recommendation by the International Committee for Weights and Measures (CIPM). The single-frequency synthesizer was designed for generating a single user-specified frequency from an atomic time base within the 192–196 THz gain bandwidth of an erbium-doped fiber amplifier (EDFA). The synthesizer was utilized for studying spectral lineshapes of acetylene transitions near 1540 nm. The recorded spectra were investigated by theoretical fits and the obtained line-center frequencies were compared to line-center frequencies measured with the acetylene-stabilized laser using the third harmonic technique. The results agreed well with each other. Final part of the thesis describes a set-up that is capable of emitting indistinguishable single photons using single molecules as photon sources. This was achieved by combining high resolution laser spectroscopy and optical microscopy at cryogenic conditions. Two single molecules in separate microscopes were identified and DC-Stark effect was exploited to shift the resonance frequencies of given molecules for perfect spectral overlap. Excitation by pulsed laser enabled triggered generation of identical single photons from two independent single molecules. The results can be utilized in the development of a number of different quantum information processing schemes.

KW - wavelength tunable lasers

KW - spectral irradiance

KW - optical frequency measurements

KW - single-photon source

M3 - Dissertation

SN - 978-952-5610-63-5

T3 - Julkaisu

PB - Centre of Metrology and Accreditation

CY - Espoo

ER -

Ahtee V. Advanced applications of wavelength tunable lasers in metrology and fundamental physics. Espoo: Centre of Metrology and Accreditation, 2010. 71 p.