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Crystals
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Raman Scattering in Optical Crystals
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Raman Scattering in Optical Crystals

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 12362

Special Issue Editor

Dr. Sergei Smetanin

E-Mail Website
Guest Editor
Department of Laser Materials and Photonics, Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov str. 38, Moscow 119991, Russia
Interests: active and nonlinear optical materials; devices for quantum electronics and photonics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Raman effect, which was predicted theoretically by Adolf Smekal in 1923, was first reported in 1928 by Indian scientist C. V. Raman (the Nobel Prize in 1930) and his coworker K. S. Krishnan and independently by Soviet scientists G. S. Landsberg and L. I. Mandelstam. Exactly 60 years ago, in 1962, stimulated Raman scattering was first discovered by E. J. Woodbury and W. K. Ng, providing the basis for a new type of lasers: Raman lasers. Currently, Raman scattering is one of the most useful tools for studying the structure of crystals and, at the same time, is an efficient method for the generation and nonlinear conversion of coherent radiation in optical crystals. This Special Issue on “Raman Scattering in Optical Crystals” intends to provide a unique international forum aimed at covering a broad area of Raman scattering for studying new optical crystals, as well as the characterization and application of optical crystals as functional media for lasers and nonlinear converters. Scientists and engineers working with optical, nonlinear, and laser crystals are invited to contribute to this issue.

Dr. Sergei N. Smetanin
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2100 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Raman-active crystals
  • Raman spectroscopy
  • vibrational studies
  • stimulated Raman scattering in crystals
  • crystalline Raman lasers

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Published Papers (6 papers)

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Research

10 pages, 2310 KiB  
Article
High-Peak-Power Passively Q-Switched Laser at 589 nm with Intracavity Stimulated Raman Scattering
by Jian-Cheng Chen, Yu-Wen Ho, Yueh-Chi Tu, Hsing-Chih Liang and Yung-Fu Chen
Crystals 2023, 13(2), 334; https://doi.org/10.3390/cryst13020334 - 16 Feb 2023
Cited by 6 | Viewed by 1829
Abstract
A novel scheme was developed for a diode-pumped passively Q-switched Nd:YVO4/KGW Raman laser at 589 nm with a diode-to-orange conversion efficiency reaching 11.4%. The compact near-concentric cavity was designed to achieve the criterion of good passive Q-switching and to contain a [...] Read more.
A novel scheme was developed for a diode-pumped passively Q-switched Nd:YVO4/KGW Raman laser at 589 nm with a diode-to-orange conversion efficiency reaching 11.4%. The compact near-concentric cavity was designed to achieve the criterion of good passive Q-switching and to contain a coupled resonator for intracavity stimulated Raman scattering (SRS) and second harmonic generation (SHG). The dependence of the output performance on the initial transmission of the saturable absorber was explored in detail. Furthermore, the output performance was studied by considering the influence of the pump-to-mode size ratio. By using an initial transmission of 50%, the highest pulse energy and peak power were 110 μJ and 118 kW, respectively, at a pump duration of 40 μs and a pump frequency of 10 kHz. Full article
(This article belongs to the Special Issue Raman Scattering in Optical Crystals)
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13 pages, 9829 KiB  
Article
Synthesis, Evolution of Morphology, Transport Properties for Bi2Te3 Nanoplates
by Yu-Jing Zhao and Fang Zhou
Crystals 2022, 12(11), 1668; https://doi.org/10.3390/cryst12111668 - 19 Nov 2022
Cited by 3 | Viewed by 2154
Abstract
Bi2Te3 has an extensive application as thermoelectric materials. Here, large scale Bi2Te3 single-crystal hexagonal nanoplates(NPs) with size of 0.4–0.8 μm were synthesized successfully by hydro-thermal method. X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope [...] Read more.
Bi2Te3 has an extensive application as thermoelectric materials. Here, large scale Bi2Te3 single-crystal hexagonal nanoplates(NPs) with size of 0.4–0.8 μm were synthesized successfully by hydro-thermal method. X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM) were used to characterize the Bi2Te3 nanoplates, which confirm the single crystal quality and smooth surface morphology with large size. We discussed the morphology-evolution in detail the influence of various reaction factors which including: the reaction temperature, the reaction time, the surfactants of the polyvinyl pyrrolidone (PVP) and pH value. The synthesis method is not only green, but also shortens the reaction time and improves the reaction efficiency. The Bi2Te3 nanopowders were hot-pressed into solid state pellets through spark plasma sintering (SPS). The values of the electrical conductivity σ were about 0.16 × 10−5 Sm−1 and 0.22 × 10−5 Sm−1 at room temperature and 530 K, respectively. The values of the Seebeck coefficient S were around −81 μVK−1 and −118 μVK−1 at room temperature and 530 K, respectively. Full article
(This article belongs to the Special Issue Raman Scattering in Optical Crystals)
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7 pages, 1388 KiB  
Article
Continuous-Wave Crystalline Laser at 714 nm via Stimulated Raman Scattering and Sum Frequency Generation
by Chien-Yen Huang, Bo-Cheng Guo, Zi-Xuan Zheng, Chia-Han Tsou, Hsing-Chih Liang and Yung-Fu Chen
Crystals 2022, 12(8), 1046; https://doi.org/10.3390/cryst12081046 - 28 Jul 2022
Cited by 3 | Viewed by 1727
Abstract
A compact high-power continuous-wave (CW) laser at 714 nm is originally developed via intracavity stimulated Raman scattering (SRS) and sum frequency generation (SFG). The fundamental wave at 1342 nm and the first-Stokes Raman wave at 1525 nm are generated by using a Nd:YVO [...] Read more.
A compact high-power continuous-wave (CW) laser at 714 nm is originally developed via intracavity stimulated Raman scattering (SRS) and sum frequency generation (SFG). The fundamental wave at 1342 nm and the first-Stokes Raman wave at 1525 nm are generated by using a Nd:YVO4 and a undoped YVO4 crystals, respectively. Compared to the self-Raman laser, the separation of the gain media for generating the fundamental and Raman waves can effectively reduce the thermal lens effect in the Nd:YVO4 crystal and efficiently enhance the SRS in the undoped YVO4 crystal. Furthermore, the undoped YVO4 crystal is coated to act as a high-reflection mirror for minimizing the cavity losses. At a pump power of 40 W, the output power at 714 nm can reach 1.8 W. The present compact design for CW laser source at 714 nm is believed to be practically useful for laser cooling and trapping of radium. Full article
(This article belongs to the Special Issue Raman Scattering in Optical Crystals)
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8 pages, 2442 KiB  
Article
Synthesis of Adjacent Stokes Spectra in a Two-Stage Transient Stimulated Raman Chirped-Pulse Amplifier
by Augustinas Petrulenas, Paulius Mackonis and Aleksej M. Rodin
Crystals 2022, 12(7), 888; https://doi.org/10.3390/cryst12070888 - 22 Jun 2022
Cited by 4 | Viewed by 1667
Abstract
The synthesis of adjacent overlapped Stokes spectra in two stages of a transient stimulated Raman chirped-pulse amplifier, tuned respectively to the vibrational modes at 901 and 767 cm−1 of a potassium gadolinium tungstate [KGd(WO4)2] crystal, is demonstrated. The [...] Read more.
The synthesis of adjacent overlapped Stokes spectra in two stages of a transient stimulated Raman chirped-pulse amplifier, tuned respectively to the vibrational modes at 901 and 767 cm−1 of a potassium gadolinium tungstate [KGd(WO4)2] crystal, is demonstrated. The contribution of the spatio-temporal overlap of seed and pump pulses, as well as the self-phase modulation, was investigated. The noncollinear configuration allows the composite bandwidth at the central wavelength of 1120 nm to be increased by a factor of 23 compared to the pump pulse bandwidth of 1.6 nm. After reaching a conversion efficiency of 35% in the second stage, the compressibility of a chirped Stokes pulse with a tailored spectrum was also investigated. Full article
(This article belongs to the Special Issue Raman Scattering in Optical Crystals)
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8 pages, 2157 KiB  
Article
Measurement of Multi-Stokes Ultrashort Pulse Shapes of Synchronously Pumped Stimulated Raman Scattering on Combined Vibrational Modes in a BaWO4 Crystal
by Dmitry P. Tereshchenko, Egor A. Peganov, Sergei N. Smetanin, Alexander G. Papashvili, Evgeny V. Shashkov, Lyudmila I. Ivleva, Elizaveta E. Dunaeva, Irina S. Voronina and Milan Frank
Crystals 2022, 12(4), 495; https://doi.org/10.3390/cryst12040495 - 2 Apr 2022
Cited by 2 | Viewed by 1791
Abstract
Multi-Stokes ultrashort pulse shapes and their relative positions of synchronously pumped stimulated Raman scattering (SRS) on combined primary and secondary vibrational modes in a BaWO4 crystal are investigated. An original method of its simultaneous measurement with the help of a streak camera [...] Read more.
Multi-Stokes ultrashort pulse shapes and their relative positions of synchronously pumped stimulated Raman scattering (SRS) on combined primary and secondary vibrational modes in a BaWO4 crystal are investigated. An original method of its simultaneous measurement with the help of a streak camera has been developed. The structure of SRS pulses at the pulse shortening effect down to the pulse duration, close to the dephasing time of the secondary Raman mode of the BaWO4 crystal, is registered and analyzed for the detuning of the Raman laser cavity length. Full article
(This article belongs to the Special Issue Raman Scattering in Optical Crystals)
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14 pages, 3830 KiB  
Article
Stimulated Raman Scattering in Pb(MoO4)1−x(WO4)x with x = 0, 0.5, 0.8 and 1.0 with Combined Frequency Shifts on High- and Low-Frequency Raman Modes under Synchronous Picosecond Laser Pumping
by Milan Frank, Sergei N. Smetanin, Michal Jelínek, David Vyhlídal, Miron B. Kosmyna, Alexey N. Shekhovstov, Ksenia A. Gubina, Vladislav E. Shukshin, Petr G. Zverev and Václav Kubeček
Crystals 2022, 12(2), 148; https://doi.org/10.3390/cryst12020148 - 21 Jan 2022
Cited by 9 | Viewed by 2447
Abstract
Comparative characteristics of spontaneous and stimulated Raman scattering in Pb(MoO4)1−x(WO4)x single crystals (x = 0, 0.5, 0.8, and 1.0) including both the high (ν1) and low (ν2) frequency internal anionic group vibrations [...] Read more.
Comparative characteristics of spontaneous and stimulated Raman scattering in Pb(MoO4)1−x(WO4)x single crystals (x = 0, 0.5, 0.8, and 1.0) including both the high (ν1) and low (ν2) frequency internal anionic group vibrations have been investigated. It was found that among these crystals, Pb(MoO4)0.2(WO4)0.8 is the most suitable for multi-wavelength Raman laser in several Raman modes simultaneously. This is caused by the optimal relative Mo/W content corresponding to the most efficient coherent combination of the (MoO4)2− and (WO4)2− vibrations enhancing the output radiation characteristics of the synchronously pumped Pb(MoO4)0.2(WO4)0.8 Raman laser. Oscillation of up to twelve, closely spaced SRS components in a range of 1128–1360 nm and the strongest pulse shortening down to 1.16 ps in comparison with not only PbMoO4 and PbWO4 but also with all the earlier investigated nominally pure scheelite-like tungstate and molybdate crystals has been achieved. Full article
(This article belongs to the Special Issue Raman Scattering in Optical Crystals)
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