The Variation of the Linewidths and Amplitudes of Sub-Doppler Resonances of 87Rb D2 Line with Laser Beam Intensity

Yıl 2022, Cilt: 26 Sayı: 2, 421 - 428, 30.04.2022

Ersoy Şahin

https://doi.org/10.16984/saufenbilder.1071289

Öz

The sub-Doppler resonances linewidths and amplitudes depend on the laser beam intensity. The effect of laser beam intensity on the resonance linewidths and amplitudes obtained from different energy transitions of atoms varies from resonance to resonance. The effect of laser beam intensity on resonance linewidths and amplitudes is of great importance for diode laser frequency stability applications. It needs to be determined by measuring. The effect of the laser beam intensity on the linewidths and amplitudes of sub-Doppler resonances were measured by laser heterodyne spectroscopy using the linearly polarized frequency stabilized extended cavity diode lasers. The measurements are compatible with the theory and the uncertainty of the measurements are fewer than 1.6 MHz and 0.3 mV for linewidths and amplitudes, respectively.

Anahtar Kelimeler

Sub-Doppler resonance, linewidth, amplitude, saturation absorption spectroscopy, laser frequency stability

Kaynakça

• [1] M. Himsworth, and T. Freegarde, “Rubidium pump-probe spectroscopy: Comparison between ab initio theory and experiment,” Physical Review A, vol. 81, pp. 023423, 2010.
• [2] W. Demtröder, Laser Spectroscopy Basic concepts and Instrumention, second enlarged ed., Springer, Verlag Berlin Heidelberg, 1996.
• [3] U. Tanaka, and T. Yabuzaki, “Frequency Stabilization of Diode Laser Using External Cavity and Doppler-Free Atomic Spectra,” Japanese Journal of Applied Physics, vol. 33, pp. 1614-1622, 1994.
• [4] S. Pustelny, V. Schultze, and D. Budker, “Dichroic atomic vapor laser lock with multi-gigahertz stabilization range,” Review of Scientific Instruments, vol. 87, pp. 063107, 2016.
• [5] S. Chakrabarti, B. Ray, and P:N. Ghosh, “Velocity selective optical pumping and repumping effects with counter and copropagating laser radiations for D2 lines of rubidium,” The European Physical Journal D, vol. 42, pp. 359–368, 2007.
• [6] M.L. Harris, C.S. Adams, S.L. Cornish, I.C. McLeod, E. Tarleton, and I.G. Hughes, “Polarization spectroscopy in rubidium and cesium,” Physical Review A, vol. 73, pp. 062509, 2006.
• [7] G.P. Barwood, P.Gill, Laser stabilization for precision measurements, C. Guo, S.C. Singh (Eds.), Handbook of Laser Technology and Applications: Laser Applications: Medical, Metrology and Communication (Volume Four), CRC Press, Boca Rotan, pp.111-126, 2021.
• [8] C. Affolderbach, G. Mileti, D. Slavov, C. Andreeva, S. Cartaleva, “Comparision of Simple and Compact Doppler and Sub-Doppler Laser Frequency Stabilisation”, Proceedings of the 18 th European Frequency and Time Forum, pp. 375-379, 2004.
• [9] S. Nakayama, “Theoretical Analysis of Rb and Cs D2 Lines in Doppler-Free Spectroscopic Techniques with Optical Pumping,” Japanese Journal of Applied Physics, vol. 24, 1985.
• [10] G. Moon, and H.R. Noh, “Observation of nonstationary effects in saturation spectroscopy,” Optics Communications, vol. 281, pp. 294-298, 2008.
• [11] N.T. Hanaboonrungroch, P. Buranasiri, P. Limsuwan, and W. Yindeesuk, “Effect of temperature on the absorption of rubidium vapor cell D2 line studied by two-photon absorption spectroscopy,” Nonlinear Optics and its Applications, 106841V, 2018.
• [12] D.A. Smith, and I.G. Hughes, “The role of hyperfine pumping in multilevel systems exhibiting saturated absorption,” American Journal of Physics, vol. 72, pp.631-637, 2004.
• [13] E. Şahin, “780 nm Lazer Dalgaboyu Standardı Mutlak frekans ve Kararlılığı Ölçümleri,” Ölçümbilim Sempozyumu ve Sergisi, pp. 45-49, 2019.
• [14] T. J. Quinn, “Practical realization of the definition of the meter, including recommended radiations of other optical frequency standards (2001),” Metrologia, vol. 40, pp. 103-133, 2003.
• [15] J. Kitching, “Chip-scale atomic devices,” Applied Physics Reviews, vol. 5, pp. 031302, 2018.
• [16] S. Micalizio, F.Levi, C.E. Calosso, M. Gozzelino, and A. Godone, “A pulsed-Laser Rb atomic frequency standard for GNSS applications,” GPS Solutions, vol. 25, 2021.
• [17] K. Numata, J.R. Chen, S.T. Wu, J.B. Abshire, and M.A. Krainak, “Frequency stabilization of distributed-feedback laser diodes at 1572 nm for lidar measurements of atmospheric carbon dioxide,” Applied Optics, vol. 50, pp. 1047-1056, 2017.
• [18] Y. Ovchinnikov, and M. Giuseppe, “Accurate rubidium atomic fountain frequency standard,” Metrologia, vol. 48, pp. 87-100, 2011.
• [19] E. Şahin, “Unmodulated diode laser stabilized by the Zeeman modulation technique,” Applied Physics B, vol. 127, 148, 2021.
• [20] Y. Deniz, A. Gedik, E. Şahin, N. Ekren, Y. Baba, “Lazer Dalgaboyu Standardı Atomik Gaz Sıcaklık Elektronik Kontrol Ünitesi Tasarımı ve Ölçüm Sonuçları,” Ölçümbilim Sempozyumu ve Sergisi, pp.59-64, 2019.
• [21] G.C. Bjorklund, M.D. Levenson, W. Lenth, and C. Ortiz, “Frequency modulation (FM) spectroscopy Theory of lineshapes and signal-to-noise analysis,” Applied Physics B, vol. 32, pp. 145–152, 1983.
• [22] J.A.R. Griffith, “Laser heterodyne spectroscopy,” Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, pp. 563-571, 1982.,
• [23] D.A. Steck, “Rubidium 87 D Line Data,” https://steck.us/alkalidata/rubidium87numbers.1.6.pdf, 21 December 2021.