Barium and Strontium Tungstate-Molybdate Crystals

EKSMA Optics can now offer nominally pure and neodymium doped Barium tungstate, Strontium tungstate and Strontium molybdate single crystals:

 

  • Ba(MoO4)x(WO4)1-x, 0<x<0.01
  • Sr(MoO4)x(WO4)1-x, 0<x<0.01
  • Sr(MoO4)x(WO4)1-x, 0.99<x<1

 

New Barium and Strontium tungstate-molybdate single crystals feature higher Raman gain as compared to KGW or CaCO3 and relatively higher thermal conductivity as compared to a Ba(NO3)2.

 

Barium and Strontium tungstate-molybdate single crystals are grown and provided with cut along a-direction. Active elements do not require precise positioning since stimulated Raman scattering (SRS) threshold slightly depends on the crystal orientation relative to pump polarization (within a few percent) and minimum threshold is reached at E||c. In this case, the polarization of the pump and stokes pulses are parallel to the optical axis (c-axis).

 

Applications:

  • Raman converters - new crystals extend the capabilities of the Raman devices in addition to commercially available Ba(NO3)2, CaCO3, KGW crystals, since new crystals have different values of the Stokes shift and allow to obtain a laser radiation at the other wavelengths
  • Raman lasers including self-Raman generation
  • Laser pulse compressors based on stimulated Raman scattering effect

 

The crystals are water-insoluble and durable. Available sizes and shapes of active elements are rectangular up to 10 x 10 x 100 mm or with cylindrical cross-section up to dia 10 x 100 mm.

 

Contact us to LEARN MORE

 PHYSICAL AND OPTICAL PROPERTIES

  Barium tungstate

Ba(MoO4)x(WO4)1-x
 0 < x < 0.01
Strontium tungstate

Sr(MoO4)x(WO4)1-x
0 < x < 0.01
Strontium molybdate

Sr(MoO4)x(WO4)1-x
0.99 < x < 1
Crystal structure Tetragonal, space group I41/a
Density 6.35 g/cm3 6.26 g/cm3 4.65 g/cm3
Thermal conductivity 2.3 W/m·K 3 W/m∙K 4 W/m∙K
Transparency range 0.45 - 5.4 um 0.25 - 5.4 um 0.25 - 5.4 um
Refractive index no =1.806, ne = 1.804 at 1064 nm
no =1.848, ne = 1.846 at 532 nm
no =1.84, ne = 1.85 at 1064 nm
no =1.87, ne = 1.88 at 532 nm
no =1.878, ne = 1.88 at 1064 nm
no =1.919, ne = 1.924 at 532 nm
Stokes shift 925 cm-1 921.5 cm-1 888 cm-1
Steady-state Raman gain at 1064 nm 8.5 cm/GW 5 cm/GW 5.5 cm/GW
Nd3+ concentration in the crystal 0 – 0.15 at. % (on Ba site) 0 – 1.5 at. % (on Sr site)
Surface optical damage threshold
(1064 nm, 4.2 ns)
2 GW/cm2 1.9 GW/cm2 0.8 GW/cm2
Mohs hardness 4

 

Literature:

1. Andrei V. Lebedev, Samvel A. Avanesov, Boris V. Ignatyev, Vladislav A. Isaev. Private Communications, Kuban State University, Russia, Krasnodar, 2016.

2. V.A Isaev, B.V. Ignatiev, A.V. Lebedev, S.A. Avanesov, P.G. Plautskiy. The Czochralski growth and structural investigations of Ba(MoO4)x(WO4)1-x solid solution single crystals // Journal of Crystal Growth. – 2013. – Vol. 363. – P. 226–233.

3. B.V. Ignatyev, V.A. Isaev, A.V. Lebedev, P.G. Plautskiy. Simultaneous dual-wavelength stimulated Raman scattering in Ba(MoO4)x(WO4)1-x solid solution single crystals // Optics Letters. - 2014. - Vol. 39. - P. 5479-5482.

4. Basiev T. T., Osiko V. V., Prokhorov A. M., Dianov E. M. Crystalline and fiber Raman lasers, in: Solid State Mid-Infrared Laser Sources // Springer, Berlin. - 2003. - 558 p.

5. Zverev P.G., Basiev T.T., Ivleva L.I., Osiko V.V., Polozkov N.M., Voronina I.S. Raman laser on strontium tungstate crystal // OSA Proc. TOPS. – 2002. – Vol. 68. – P. 70-73.

6. Basiev T., Doroshenko M., Ivleva L., Voronina I., Konjushkin V., Osiko V., Vasilyev S. Demonstration of high self-Raman laser performance of a diode-pumped SrMoO4:Nd3+ crystal // Optics Letters. – 2009. – Vol. 34. – P. 1102–1104.

RAMAN WAVELENGTHS GENERATIONS

 

Crystal Barium tungstate Strontium tungstate Strontium molybdate
Chemical formula Ba(MoO₄)x(WO₄)₁-x
0 < x < 0.01
Sr(MoO₄)x(WO₄)₁-x
0 < x < 0.01
Sr(MoO₄)x(WO₄)₁-x
0.99 < x < 1
Oscillation coefficient 925 cm-¹ 921.5 cm-¹ 888 cm-¹
Pump 1064 nm 532 nm 1064 nm 532 nm 1064 nm 532 nm
1 Stoke 1180 560 1180 559 1175 558
2 Stoke 1325 590 1324 590 1312 588
3 Stoke 1510 624 1507 624 1485 620
4 Stoke 1755 662 1751 662 1710 656
1 Antistoke 969 507 969 507 972 508
Eksma Optics is a member of: Linked.in Twitter.com
PayPal.com Paysera
© Optolita UAB 2013. All rights reserved.
Touched by digitouch!