Generation of Entangled Photons by A Short Coherence Length Violet Diode Laser
Pumping a BBO crystal by a violet diode laser with a wavelength of (405 nm) output power of (24 mW) and a line width of (3nm) was employed to generate entangled photons with a wavelength of 810 nm by achieving type II phase matching conditions. The coincidence count rate obtained in this experim...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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University of Diyala
2013-06-01
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| Series: | Diyala Journal of Engineering Sciences |
| Subjects: | |
| Online Access: | https://djes.info/index.php/djes/article/view/524 |
| _version_ | 1798036332433375232 |
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| author | Ra'ad Subhi Abbood Ahmed I. Khaleel Shelan Kh. Tawfeeq |
| author_facet | Ra'ad Subhi Abbood Ahmed I. Khaleel Shelan Kh. Tawfeeq |
| author_sort | Ra'ad Subhi Abbood |
| collection | DOAJ |
| description |
Pumping a BBO crystal by a violet diode laser with a wavelength of (405 nm) output power of (24 mW) and a line width of (3nm) was employed to generate entangled photons with a wavelength of 810 nm by achieving type II phase matching conditions.
The coincidence count rate obtained in this experiment was in the range of (18000) counts/s. Two BBO crystals with different thicknesses of (4 mm and 2 mm) were tested, where maximum count rates of about (18000) counts/s was obtained with a (5*5*2) mm BBO crystal where the short coherence time for the pumping source was tolerated by using shorter BBO crystals. Also, the effect of compensating crystal on the walk-off effect was studied. The coincidence count rates were increased by using these crystals when their optic axes were fixed in the opposite direction relative to the optic axis of the original BBO crystal
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| first_indexed | 2024-04-11T21:11:23Z |
| format | Article |
| id | doaj.art-bc450115f4a246de9ec98632cbcc46ba |
| institution | Directory Open Access Journal |
| issn | 1999-8716 2616-6909 |
| language | English |
| last_indexed | 2024-04-11T21:11:23Z |
| publishDate | 2013-06-01 |
| publisher | University of Diyala |
| record_format | Article |
| series | Diyala Journal of Engineering Sciences |
| spelling | doaj.art-bc450115f4a246de9ec98632cbcc46ba2022-12-22T04:03:01ZengUniversity of DiyalaDiyala Journal of Engineering Sciences1999-87162616-69092013-06-016210.24237/djes.2013.06206Generation of Entangled Photons by A Short Coherence Length Violet Diode LaserRa'ad Subhi Abbood0Ahmed I. Khaleel1Shelan Kh. Tawfeeq2Institute of Laser for Postgraduate Studies, Baghdad UniversityInstitute of Laser for Postgraduate Studies, Baghdad UniversityInstitute of Laser for Postgraduate Studies, Baghdad University Pumping a BBO crystal by a violet diode laser with a wavelength of (405 nm) output power of (24 mW) and a line width of (3nm) was employed to generate entangled photons with a wavelength of 810 nm by achieving type II phase matching conditions. The coincidence count rate obtained in this experiment was in the range of (18000) counts/s. Two BBO crystals with different thicknesses of (4 mm and 2 mm) were tested, where maximum count rates of about (18000) counts/s was obtained with a (5*5*2) mm BBO crystal where the short coherence time for the pumping source was tolerated by using shorter BBO crystals. Also, the effect of compensating crystal on the walk-off effect was studied. The coincidence count rates were increased by using these crystals when their optic axes were fixed in the opposite direction relative to the optic axis of the original BBO crystal https://djes.info/index.php/djes/article/view/524EntanglementEPRspontaneous parametric down conversion |
| spellingShingle | Ra'ad Subhi Abbood Ahmed I. Khaleel Shelan Kh. Tawfeeq Generation of Entangled Photons by A Short Coherence Length Violet Diode Laser Diyala Journal of Engineering Sciences Entanglement EPR spontaneous parametric down conversion |
| title | Generation of Entangled Photons by A Short Coherence Length Violet Diode Laser |
| title_full | Generation of Entangled Photons by A Short Coherence Length Violet Diode Laser |
| title_fullStr | Generation of Entangled Photons by A Short Coherence Length Violet Diode Laser |
| title_full_unstemmed | Generation of Entangled Photons by A Short Coherence Length Violet Diode Laser |
| title_short | Generation of Entangled Photons by A Short Coherence Length Violet Diode Laser |
| title_sort | generation of entangled photons by a short coherence length violet diode laser |
| topic | Entanglement EPR spontaneous parametric down conversion |
| url | https://djes.info/index.php/djes/article/view/524 |
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