Details
| Original language | English |
|---|---|
| Pages (from-to) | 5262-5265 |
| Number of pages | 4 |
| Journal | Optics letters |
| Volume | 45 |
| Issue number | 18 |
| Early online date | 12 Aug 2020 |
| Publication status | Published - 15 Sept 2020 |
Abstract
For future generations of gravitational wave detectors, it is proposed to use the helical Laguerre–Gaussian LG33 mode to reduce thermal noise, which limits the detector sensitivity. At the same time, this requires the efficient generation of squeezed vacuum states in the LG33 mode for quantum noise reduction. Since this technique includes the process of second harmonic generation (SHG), we experimentally compare the conversion efficiency and harmonic output field of the LG00 and LG33 modes in a cavity-enhanced SHG using the same 7% doped MgO:LiNbO3 crystal. Conversion efficiencies of 96% and 45% are achieved, respectively. The influence of mode mismatches and astigmatism is analyzed to estimate the ratio of the pump mode-dependent effective nonlinearities to be d00/d33 ∼ 5. Furthermore, we show that absorption loss in the crystal is more relevant for the LG33 mode.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Optics letters, Vol. 45, No. 18, 15.09.2020, p. 5262-5265.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Frequency-doubling of continuous laser light in Laguerre–Gaussian modes LG0,0 and LG3,3
AU - Heinze, Joscha
AU - Vahlbruch, Henning
AU - Willke, Benno
N1 - Funding Information: Deutsche Forschungsgemeinschaft (EXC-2123 QuantumFrontiers - 390837967).
PY - 2020/9/15
Y1 - 2020/9/15
N2 - For future generations of gravitational wave detectors, it is proposed to use the helical Laguerre–Gaussian LG33 mode to reduce thermal noise, which limits the detector sensitivity. At the same time, this requires the efficient generation of squeezed vacuum states in the LG33 mode for quantum noise reduction. Since this technique includes the process of second harmonic generation (SHG), we experimentally compare the conversion efficiency and harmonic output field of the LG00 and LG33 modes in a cavity-enhanced SHG using the same 7% doped MgO:LiNbO3 crystal. Conversion efficiencies of 96% and 45% are achieved, respectively. The influence of mode mismatches and astigmatism is analyzed to estimate the ratio of the pump mode-dependent effective nonlinearities to be d00/d33 ∼ 5. Furthermore, we show that absorption loss in the crystal is more relevant for the LG33 mode.
AB - For future generations of gravitational wave detectors, it is proposed to use the helical Laguerre–Gaussian LG33 mode to reduce thermal noise, which limits the detector sensitivity. At the same time, this requires the efficient generation of squeezed vacuum states in the LG33 mode for quantum noise reduction. Since this technique includes the process of second harmonic generation (SHG), we experimentally compare the conversion efficiency and harmonic output field of the LG00 and LG33 modes in a cavity-enhanced SHG using the same 7% doped MgO:LiNbO3 crystal. Conversion efficiencies of 96% and 45% are achieved, respectively. The influence of mode mismatches and astigmatism is analyzed to estimate the ratio of the pump mode-dependent effective nonlinearities to be d00/d33 ∼ 5. Furthermore, we show that absorption loss in the crystal is more relevant for the LG33 mode.
UR - http://www.scopus.com/inward/record.url?scp=85091051571&partnerID=8YFLogxK
U2 - 10.1364/OL.402371
DO - 10.1364/OL.402371
M3 - Article
C2 - 32932506
AN - SCOPUS:85091051571
VL - 45
SP - 5262
EP - 5265
JO - Optics letters
JF - Optics letters
SN - 0146-9592
IS - 18
ER -