| 1. |
- Calil Kores, Cristine, et al.
(författare)
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Temperature dependence of the resonance line of optically pumped distributed-feedback lasers
- 2018
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Ingår i: Optics InfoBase Conference Papers. - : OSA - The Optical Society. - 9781943580484
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Konferensbidrag (refereegranskat)abstract
- We characterize experimentally and theoretically a distributed-feedback laser resonator subject to a thermal chirp. The total accumulated phase shift determines the resonance wavelength. The reflectivities (outcoupling losses) at the resonance wavelength govern the resonance linewidth.
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| 2. |
- Calil Kores, Cristine, et al.
(författare)
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Temperature dependence of the spectral characteristics of distributed-feedback resonators
- 2018
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Ingår i: Optics Express. - 1094-4087. ; 26:4, s. 4892-4905
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Tidskriftsartikel (refereegranskat)abstract
- We characterize the spectral response of a distributed-feedback resonator when subject to a thermal chirp. An Al2O3 rib waveguide with a corrugated surface Bragg grating inscribed into its SiO2 top cladding is experimentally investigated. We induce a near-to-linear temperature gradient along the resonator, leading to a similar variation of the grating period, and characterize its spectral response in terms of wavelength and linewidth of the resonance peak. Simulations are carried out, showing good agreement with the experimental results and indicating that the wavelength of the resonance peak is a result only of the total accumulated phase shift. For any chirp profile we are able to calculate the reflectivities at the resonance wavelength, and this information largely explains how the linewidth of the resonance changes. This result shows that the increase in linewidth is governed by the increase of the resonator outcoupling losses.
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| 4. |
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| 5. |
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| 6. |
- Geskus, Dimitri, 1979-, et al.
(författare)
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Extreme Linewidth Broadening in a Nd:YLiF4-KGW Intracavity Raman Laser
- 2015
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Ingår i: Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015.
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Konferensbidrag (refereegranskat)abstract
- Linewidth broadening of up to 4 nm of the fundamentaleld has been observed in a intracavity Nd:YLF-KGW Ramanlaser. Nine laser congurations have been analyzedto identify the responsible processes using a mathematicalmodel.
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| 7. |
- Ismail, Nur, et al.
(författare)
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Mode profiles and Airy distributions of Fabry-Perot resonators with frequency-dependent mirror reflectivity
- 2017
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Ingår i: Laser Resonators, Microresonators, and Beam Control XIX. - : SPIE - International Society for Optical Engineering. - 9781510606210 - 9781510606227
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Konferensbidrag (refereegranskat)abstract
- We thoroughly investigate the Fabry-Perot resonator, avoid approximations, and derive its generic Airy distribution, equaling the internal resonance enhancement, and all related Airy distributions, such as the commonly known transmission. We verify that the sum of the mode profiles of all longitudinal modes is the fundamental physical function characterizing the Fabry-Perot resonator and generating the Airy distributions. We investigate the influence of frequency-dependent mirror reflectivities on the mode profiles and the resulting Airy distributions. The mode profiles then deviate from simple Lorentzian lines and exhibit peaks that are not located at resonant frequencies. Our simple, yet accurate analysis greatly facilitates the characterization of Fabry-Perot resonators with strongly frequency-dependent mirror reflectivities.
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| 8. |
- Ismail, Nur, 1977-, et al.
(författare)
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The Fabry-Pérot resonator: Spectral line shapes, generic and related Airy distributions, linewidths, finesses, and performance at low or frequency-dependent reflectivity
- 2016
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Ingår i: Optics Express. - : Optical Society of America. - 1094-4087. ; 24:15, s. 16366-16389
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Tidskriftsartikel (refereegranskat)abstract
- We systematically characterize the Fabry-Pérot resonator. We derive the generic Airy distribution of a Fabry-Pérot resonator, which equals the internal resonance enhancement factor, and show that all related Airy distributions are obtained by simple scaling factors. We analyze the textbook approaches to the Fabry-Pérot resonator and point out various misconceptions. We verify that the sum of the mode profiles of all longitudinal modes is the fundamental physical function that characterizes the Fabry-Pérot resonator and generates the Airy distribution. Consequently, the resonator losses are quantified by the linewidths of the underlying Lorentzian lines and not by the measured Airy linewidth. Therefore, we introduce the Lorentzian finesse which provides the spectral resolution of the Lorentzian lines, whereas the usually considered Airy finesse only quantifies the performance of the Fabry-Pérot resonator as a scanning spectrometer. We also point out that the concepts of linewidth and finesse of the Airy distribution of a Fabry-Pérot resonator break down at low reflectivity. Furthermore, we show that a Fabry-Pérot resonator has no cut-off resonance wavelength. Finally, we investigate the influence of frequency-dependent mirror reflectivities, allowing for the direct calculation of its deformed mode profiles.
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