Stabilizing Frequency of a Diode Laser to a Reference Transition of Molecular Iodine through Modulation Transfer Spectroscopy
We report the frequency stabilization of an external cavity diode laser (ECDL) to a reference molecular iodine (I<sub>2</sub>) transition at 13,531.18 cm<sup>−1</sup> (739.03382 nm). Using the Modulation Transfer Spectroscopy (MTS) method for the highly sensitive detection of...
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MDPI AG
2023-05-01
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| Online Access: | https://www.mdpi.com/2218-2004/11/5/83 |
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| author | Lakhi Sharma Atish Roy Subhasis Panja Subhadeep De |
| author_facet | Lakhi Sharma Atish Roy Subhasis Panja Subhadeep De |
| author_sort | Lakhi Sharma |
| collection | DOAJ |
| description | We report the frequency stabilization of an external cavity diode laser (ECDL) to a reference molecular iodine (I<sub>2</sub>) transition at 13,531.18 cm<sup>−1</sup> (739.03382 nm). Using the Modulation Transfer Spectroscopy (MTS) method for the highly sensitive detection of weak absorption signals, the Doppler-free absorption peaks of I<sub>2</sub> corresponding to the hot band transition R(78) (1–11) are resolved. The ECDL’s frequency is stabilized with respect to one of the lines lying within the reference absorption band. For this, the iodine vapor cell is heated to 450 °C and the corresponding circularly polarized pump and probe beam powers are maintained at 10 mW and 1 mW, respectively, to avoid power broadening. The short (100 ms) and long-term (50 h) linewidths of the frequency stabilized laser are measured to be 0.75(3) MHz and 0.5(2) MHz, respectively, whereas the natural linewidth of the specific I<sub>2</sub>-transitions lie within a range of tens of MHz. |
| first_indexed | 2024-03-11T03:57:07Z |
| format | Article |
| id | doaj.art-d6616c7ef3d04c2d8b63ade63b543a8d |
| institution | Directory Open Access Journal |
| issn | 2218-2004 |
| language | English |
| last_indexed | 2024-03-11T03:57:07Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
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| series | Atoms |
| spelling | doaj.art-d6616c7ef3d04c2d8b63ade63b543a8d2023-11-18T00:26:46ZengMDPI AGAtoms2218-20042023-05-011158310.3390/atoms11050083Stabilizing Frequency of a Diode Laser to a Reference Transition of Molecular Iodine through Modulation Transfer SpectroscopyLakhi Sharma0Atish Roy1Subhasis Panja2Subhadeep De3CSIR—National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, IndiaCSIR—National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, IndiaCSIR—National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, IndiaInter-University Centre for Astronomy and Astrophysics (IUCAA), Post Bag 4, Pune 411007, IndiaWe report the frequency stabilization of an external cavity diode laser (ECDL) to a reference molecular iodine (I<sub>2</sub>) transition at 13,531.18 cm<sup>−1</sup> (739.03382 nm). Using the Modulation Transfer Spectroscopy (MTS) method for the highly sensitive detection of weak absorption signals, the Doppler-free absorption peaks of I<sub>2</sub> corresponding to the hot band transition R(78) (1–11) are resolved. The ECDL’s frequency is stabilized with respect to one of the lines lying within the reference absorption band. For this, the iodine vapor cell is heated to 450 °C and the corresponding circularly polarized pump and probe beam powers are maintained at 10 mW and 1 mW, respectively, to avoid power broadening. The short (100 ms) and long-term (50 h) linewidths of the frequency stabilized laser are measured to be 0.75(3) MHz and 0.5(2) MHz, respectively, whereas the natural linewidth of the specific I<sub>2</sub>-transitions lie within a range of tens of MHz.https://www.mdpi.com/2218-2004/11/5/83frequency stabilizationmodulation transfer spectroscopyatomic clockfrequency metrologyfour-wave mixingsaturated absorption spectroscopy |
| spellingShingle | Lakhi Sharma Atish Roy Subhasis Panja Subhadeep De Stabilizing Frequency of a Diode Laser to a Reference Transition of Molecular Iodine through Modulation Transfer Spectroscopy Atoms frequency stabilization modulation transfer spectroscopy atomic clock frequency metrology four-wave mixing saturated absorption spectroscopy |
| title | Stabilizing Frequency of a Diode Laser to a Reference Transition of Molecular Iodine through Modulation Transfer Spectroscopy |
| title_full | Stabilizing Frequency of a Diode Laser to a Reference Transition of Molecular Iodine through Modulation Transfer Spectroscopy |
| title_fullStr | Stabilizing Frequency of a Diode Laser to a Reference Transition of Molecular Iodine through Modulation Transfer Spectroscopy |
| title_full_unstemmed | Stabilizing Frequency of a Diode Laser to a Reference Transition of Molecular Iodine through Modulation Transfer Spectroscopy |
| title_short | Stabilizing Frequency of a Diode Laser to a Reference Transition of Molecular Iodine through Modulation Transfer Spectroscopy |
| title_sort | stabilizing frequency of a diode laser to a reference transition of molecular iodine through modulation transfer spectroscopy |
| topic | frequency stabilization modulation transfer spectroscopy atomic clock frequency metrology four-wave mixing saturated absorption spectroscopy |
| url | https://www.mdpi.com/2218-2004/11/5/83 |
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