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KGW—KGd(WO4)2—Gadolinium potassium tungstate
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KGW—KGd(WO4)2—Gadolinium potassium tungstate

Gadolinium potassium tungstate (KGd(WO4)2) crystal has a wide transmission range, good thermal conductivity, high damage threshold, large Raman shift coefficient and high Raman gain, etc. It is a kind of excitation Raman laser crystal with excellent performance, and it can maintain high conversion efficiency and beam quality during the Raman frequency conversion process.KGW crystal is able to withstand high pumping power, and it is suitable for pumping light of various wavelengths.
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Description
Parameters
Cas'Tech Class
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Introduction

Gadolinium potassium tungstate (KGd(WO4)2) crystal has a wide transmission range, good thermal conductivity, high damage threshold, large Raman shift coefficient and high Raman gain, etc. It is a kind of excitation Raman laser crystal with excellent performance, and it can maintain high conversion efficiency and beam quality during the Raman frequency conversion process.KGW crystal is able to withstand high pumping power, and it is suitable for pumping light of various wavelengths. KGW crystal can withstand high pump power and is suitable for a variety of wavelengths of pump laser, and is widely used in Raman lasers, laser frequency conversion, medical imaging, photodynamic therapy, environmental monitoring, spectroscopy research, material processing and other fields.

 

Table 1: Basic characteristics

Crystal Structure

Monoclinic

Space Group

C2/c

Cellular Parameters(Å)

a=8.09,  b=10.43,  c=7.58

Transparency

0.3~5 μm

Density

7.27 g/cm3

Mohs Hardness

4-5 Mohs

Melting Point

1087 C

Phase Inversion Temperature

1031 C

Thermal Conductivity

Ka=2.6 W/m/K

Kb=3.8 W/m/K

Kc=3.4 W/m/K

De-phasing time

2 ps

DN/dt

Dnp/dt=-15.7 x 10-6/K

DNm/dt=-11.8 x 10-6/K

DNg/dt=-17.3 x 10-6/K

Refractive Index (@1064 nm)

np=1.982

nm=2.010

ng=2.061

 

Table 2: Raman properties

Raman Frequency Shift

767 cm-1 (p[gg]p)

901 cm-1 (p[mm]p)

Raman Linewidth

6.4 cm-1@767 cm-1 (p[gg]p)

5.4cm-1@901 cm-1 (p[mm]p) 

Raman Gain (ps, transient region)

11 cm/GW @532 nm

3 cm/GW @1064 nm

 

KGW crystal has two large Raman modes related to pump polarization, located at 768 cm ⁻¹ and 901 cm ⁻¹, respectively. This means that when the pump light is irradiated onto the KGW crystal, there will be a frequency shift of Stokes light and anti Stokes light, corresponding to the frequencies of these two Raman modes. This characteristic enables KGW crystals to convert the frequency of pump light to a specific Raman shift frequency, thereby achieving laser frequency conversion and expansion. The relatively wide Raman linewidth means that the crystal can cover a certain range of frequencies during Raman conversion, which is beneficial for achieving broadband frequency conversion and spectral extension.

 

Table 3: Product indicators

Orientation

[010]

Maximum Length

50 mm

Dimensional Tolerances

Diameter:0.1 mm

Length:0.5 mm

Clear Aperture

> 90% 

Surface Quality

10/5  to MIL-PRF-13830B

Flatness

<λ/6  @ 633 nm

Parallelism

20″

Perpendicularity

≦15′

Coating

Coatings are available upon requst

Quality Guarantee Period

One year (normal use)

 

Notes

CASTECH can provide high quality KGW crystals in different sizes, if you have special requirements, please contact us.

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Table 1: Basic characteristics

Crystal Structure

Monoclinic

Space Group

C2/c

Cellular Parameters(Å)

a=8.09,  b=10.43,  c=7.58

Transparency

0.3~5 μm

Density

7.27 g/cm3

Mohs Hardness

4-5 Mohs

Melting Point

1087 C

Phase Inversion Temperature

1031 C

Thermal Conductivity

Ka=2.6 W/m/K

Kb=3.8 W/m/K

Kc=3.4 W/m/K

De-phasing time

2 ps

DN/dt

Dnp/dt=-15.7 x 10-6/K

DNm/dt=-11.8 x 10-6/K

DNg/dt=-17.3 x 10-6/K

Refractive Index (@1064 nm)

np=1.982

nm=2.010

ng=2.061

 

Table 2: Raman properties

Raman Frequency Shift

767 cm-1 (p[gg]p)

901 cm-1 (p[mm]p)

Raman Linewidth

6.4 cm-1@767 cm-1 (p[gg]p)

5.4cm-1@901 cm-1 (p[mm]p) 

Raman Gain (ps, transient region)

11 cm/GW @532 nm

3 cm/GW @1064 nm

 

KGW crystal has two large Raman modes related to pump polarization, located at 768 cm ⁻¹ and 901 cm ⁻¹, respectively. This means that when the pump light is irradiated onto the KGW crystal, there will be a frequency shift of Stokes light and anti Stokes light, corresponding to the frequencies of these two Raman modes. This characteristic enables KGW crystals to convert the frequency of pump light to a specific Raman shift frequency, thereby achieving laser frequency conversion and expansion. The relatively wide Raman linewidth means that the crystal can cover a certain range of frequencies during Raman conversion, which is beneficial for achieving broadband frequency conversion and spectral extension.

 

Table 3: Product indicators

Orientation

[010]

Maximum Length

50 mm

Dimensional Tolerances

Diameter:0.1 mm

Length:0.5 mm

Clear Aperture

> 90% 

Surface Quality

10/5  to MIL-PRF-13830B

Flatness

<λ/6  @ 633 nm

Parallelism

20″

Perpendicularity

≦15′

Coating

Coatings are available upon requst

Quality Guarantee Period

One year (normal use)

 

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KGW—KGd(WO4)2—Gadolinium potassium tungstate
Yb:KGW
  • KGW—KGd(WO4)2—Gadolinium potassium tungstate

  • Gadolinium potassium tungstate (KGd(WO4)2) crystal has a wide transmission range, good thermal conductivity, high damage threshold, large Raman shift coefficient and high Raman gain, etc. It is a kind of excitation Raman laser crystal with excellent performance, and it can maintain high conversion efficiency and beam quality during the Raman frequency conversion process.KGW crystal is able to withstand high pumping power, and it is suitable for pumping light of various wavelengths.
Description
Cas'Tech Class
Parameters
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Introduction

Gadolinium potassium tungstate (KGd(WO4)2) crystal has a wide transmission range, good thermal conductivity, high damage threshold, large Raman shift coefficient and high Raman gain, etc. It is a kind of excitation Raman laser crystal with excellent performance, and it can maintain high conversion efficiency and beam quality during the Raman frequency conversion process.KGW crystal is able to withstand high pumping power, and it is suitable for pumping light of various wavelengths. KGW crystal can withstand high pump power and is suitable for a variety of wavelengths of pump laser, and is widely used in Raman lasers, laser frequency conversion, medical imaging, photodynamic therapy, environmental monitoring, spectroscopy research, material processing and other fields.

 

Table 1: Basic characteristics

Crystal Structure

Monoclinic

Space Group

C2/c

Cellular Parameters(Å)

a=8.09,  b=10.43,  c=7.58

Transparency

0.3~5 μm

Density

7.27 g/cm3

Mohs Hardness

4-5 Mohs

Melting Point

1087 C

Phase Inversion Temperature

1031 C

Thermal Conductivity

Ka=2.6 W/m/K

Kb=3.8 W/m/K

Kc=3.4 W/m/K

De-phasing time

2 ps

DN/dt

Dnp/dt=-15.7 x 10-6/K

DNm/dt=-11.8 x 10-6/K

DNg/dt=-17.3 x 10-6/K

Refractive Index (@1064 nm)

np=1.982

nm=2.010

ng=2.061

 

Table 2: Raman properties

Raman Frequency Shift

767 cm-1 (p[gg]p)

901 cm-1 (p[mm]p)

Raman Linewidth

6.4 cm-1@767 cm-1 (p[gg]p)

5.4cm-1@901 cm-1 (p[mm]p) 

Raman Gain (ps, transient region)

11 cm/GW @532 nm

3 cm/GW @1064 nm

 

KGW crystal has two large Raman modes related to pump polarization, located at 768 cm ⁻¹ and 901 cm ⁻¹, respectively. This means that when the pump light is irradiated onto the KGW crystal, there will be a frequency shift of Stokes light and anti Stokes light, corresponding to the frequencies of these two Raman modes. This characteristic enables KGW crystals to convert the frequency of pump light to a specific Raman shift frequency, thereby achieving laser frequency conversion and expansion. The relatively wide Raman linewidth means that the crystal can cover a certain range of frequencies during Raman conversion, which is beneficial for achieving broadband frequency conversion and spectral extension.

 

Table 3: Product indicators

Orientation

[010]

Maximum Length

50 mm

Dimensional Tolerances

Diameter:0.1 mm

Length:0.5 mm

Clear Aperture

> 90% 

Surface Quality

10/5  to MIL-PRF-13830B

Flatness

<λ/6  @ 633 nm

Parallelism

20″

Perpendicularity

≦15′

Coating

Coatings are available upon requst

Quality Guarantee Period

One year (normal use)

 

Notes

CASTECH can provide high quality KGW crystals in different sizes, if you have special requirements, please contact us.

Table 1: Basic characteristics

Crystal Structure

Monoclinic

Space Group

C2/c

Cellular Parameters(Å)

a=8.09,  b=10.43,  c=7.58

Transparency

0.3~5 μm

Density

7.27 g/cm3

Mohs Hardness

4-5 Mohs

Melting Point

1087 C

Phase Inversion Temperature

1031 C

Thermal Conductivity

Ka=2.6 W/m/K

Kb=3.8 W/m/K

Kc=3.4 W/m/K

De-phasing time

2 ps

DN/dt

Dnp/dt=-15.7 x 10-6/K

DNm/dt=-11.8 x 10-6/K

DNg/dt=-17.3 x 10-6/K

Refractive Index (@1064 nm)

np=1.982

nm=2.010

ng=2.061

 

Table 2: Raman properties

Raman Frequency Shift

767 cm-1 (p[gg]p)

901 cm-1 (p[mm]p)

Raman Linewidth

6.4 cm-1@767 cm-1 (p[gg]p)

5.4cm-1@901 cm-1 (p[mm]p) 

Raman Gain (ps, transient region)

11 cm/GW @532 nm

3 cm/GW @1064 nm

 

KGW crystal has two large Raman modes related to pump polarization, located at 768 cm ⁻¹ and 901 cm ⁻¹, respectively. This means that when the pump light is irradiated onto the KGW crystal, there will be a frequency shift of Stokes light and anti Stokes light, corresponding to the frequencies of these two Raman modes. This characteristic enables KGW crystals to convert the frequency of pump light to a specific Raman shift frequency, thereby achieving laser frequency conversion and expansion. The relatively wide Raman linewidth means that the crystal can cover a certain range of frequencies during Raman conversion, which is beneficial for achieving broadband frequency conversion and spectral extension.

 

Table 3: Product indicators

Orientation

[010]

Maximum Length

50 mm

Dimensional Tolerances

Diameter:0.1 mm

Length:0.5 mm

Clear Aperture

> 90% 

Surface Quality

10/5  to MIL-PRF-13830B

Flatness

<λ/6  @ 633 nm

Parallelism

20″

Perpendicularity

≦15′

Coating

Coatings are available upon requst

Quality Guarantee Period

One year (normal use)

 

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