Crystalline passive Q-switching of 1.3-µm Nd-lasers and Raman shifting to eye-safe region

Basiev, T. T.; Sigachev, V. B.; Doroshenko, Maxim E.; Zverev, Petr G.; Осико, В. В.; Prokhorov, A. M.

doi:10.1364/cleo_europe.1994.ctuk56

1994 Conference on Lasers and Electro-Optics Europe 1994

DOI: 10.1364/cleo_europe.1994.ctuk56

|View full text |Cite

Crystalline passive Q-switching of 1.3-µm Nd-lasers and Raman shifting to eye-safe region

T. T. Basiev

V. B. Sigachev

Maxim E. Doroshenko

et al.

Abstract: Stimulated Raman scattering (SRS) of 1.3-µm radiation of Nd-lasers can be used to obtain radiation in eye-safe spectral region. For this purpose it is necessary to have an appropriate pump laser operating in Q-switched mode and active medium for SRS. The simplest and most reliable Q-switching of Nd-lasers at 1.3-µm wavelength can be realized by using crystalline saturable absorbers (SA). Nowadays only a limited number of dielectric crystals, which possess nonlinear saturable absorption in the desired region, a… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1999

2005

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different Stokes shifted components were obtained with longest wavelength about 2.2 µm with efficiency up to 10%. The newly developed barium tungstate crystals are proved to be efficient source for both picosecond and nanosecond time scale Raman lasing [1]. Our results on stimulated Raman scattering under nanosecond IR pumping in comparison with the well-known barium nitrate crystal showed rather close thresholds and conversion efficiency.…”

mentioning

confidence: 54%

New mid IR (1.5–2.2 μm) Raman lasers based on barium tungstate and barium nitrate crystals

Basiev¹,

Doroshenko²,

Osiko³

et al. 2005

Laser Phys. Lett.

View full text Add to dashboard Cite

Efficient mid IR (1.5-2.2 µm) Raman lasers based on novel BaWO 4 and known Ba(NO 3 ) 2 Raman crystals were developed and investigated. Different Stokes shifted components were obtained with longest wavelength about 2.2 µm with efficiency up to 10%. Main informationNowadays great attention is paid to the development of novel lasers oscillating in mid IR spectral range (2-5 µm) where the lack of laser sources (especially within 3-5 µm range) is quite noticeable. There are several approaches towards development of laser sources for mid IR spectral region: development of new solid state laser media, molecular gas lasers, OPO generators etc. One of the promising approaches is Raman shifting of the available laser sources towards mid IR range. The main problem here is that most of the Raman crystals' frequency shift is about 1000 cm −1 , so to obtain mid IR radiation one should start from as long wavelength as possible and obtain second or even third Stokes shifted components. At the same time it should be kept in mind that Raman gain drops rapidly with longer wavelength pump, so that stimulated Raman scattering threshold intensities become separated from the crystal optical damage threshold intensities by rather narrow interval making Raman lasing a sort of challenge. Another problem for mid IR Raman lasing is that a lot of well known efficient Raman crystals are opaque in this spectral range due to the matrix absorption.The newly developed barium tungstate crystals are proved to be efficient source for both picosecond and nanosecond time scale Raman lasing [1]. Our results on stimulated Raman scattering under nanosecond IR pumping in comparison with the well-known barium nitrate crystal showed rather close thresholds and conversion efficiency. Though BaWO 4 crystals are much further transparent and allows obtaining Raman shifted radiation up to 3 µm.As the initial pump source the 1.34 µm YAG:Nd 3+ laser and 1.53 µm Er:Glass laser were applied. These lasers were selected due to their longest lasing wavelengths where short Q-switched pulses can be rather reliably obtained. In our experiments accousto-optically Qswitching for Nd:YAG laser and passive Q-switching by Co 2+ :spinel crystal for Er:Glass laser were applied which allowed to obtain pulses with 40-50 ns duration in both cases. This lasers served as pump sources for 80 mm long BaWO 4 crystal or 50 mm long Ba(NO 3 ) 2 crystal based Raman lasers with the cavity formed by a rear plain HR mirror with 90-100% reflectivity within oscillating spectral range and about 80% transmittance at pumping wavelengths. To optimize first, second or third Stokes

show abstract

mentioning

confidence: 54%

New mid IR (1.5–2.2 μm) Raman lasers based on barium tungstate and barium nitrate crystals

Basiev¹,

Doroshenko²,

Osiko³

et al. 2005

Laser Phys. Lett.

View full text Add to dashboard Cite

show abstract

Stimulated Raman scattering of laser radiation in Raman crystals

1999

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Crystalline passive Q-switching of 1.3-µm Nd-lasers and Raman shifting to eye-safe region

Cited by 2 publications

References 0 publications

New mid IR (1.5–2.2 μm) Raman lasers based on barium tungstate and barium nitrate crystals

New mid IR (1.5–2.2 μm) Raman lasers based on barium tungstate and barium nitrate crystals

Stimulated Raman scattering of laser radiation in Raman crystals

Contact Info

Product

Resources

About