製品介紹・サービス

		YLF Laser Crystals
		YAG Laser Crystals
		YVO4 Crystal
		OPO
		OPA's
		Potassium Titanyl Arsenate(KTiOAsO4)

返回首頁 > 雷射二極體材料
　

Introduction

Nd:YVO₄ is one of the most efficient laser host crystal currently existing for diode laser-pumped solid-state lasers. Nd:YVO₄ is an excellent crystal for high power, stable and cos

4 Low lasing threshold and high slope efficiency
4 Large stimulated emission cross-section at lasing wavelength
4 High absorption over a wide pumping wavelength bandwidth
4 Optically uniaxial and large birefringence emits polarized laser
4 Low dependency on pumping wavelength and tend to single mode output

CRYSTECH massively produces and provides high quality Nd:YVO₄ crystals at competitive prices.

Basic Properties:

Atomic Density:	1.26x10²⁰ atoms/cm³(Nd 1.0%)
Crystal Structure:	Zircon Tetragonal, space group D_4h-I4/amd a=b=7.1193, c=6.2892
Density:	4.22g/cm³
Mohs Hardness:	4-5 (Glass-like)
Thermal Expansion Coefficient (300K):	a _a=4.43x10^-6/K a _c=11.37x10^-6/K
Thermal Conductivity Coefficient (300K):	//C: 0.0523W/cm/K ^ C: 0.0510W/cm/ K

Optical Properties:

Lasing wavelength:	1064nm, 1342nm
Thermal optical coefficient (300K):	dn_o/dT=8.5x 10^-6/K dn_e/dT=2.9x 10^-6/K
Sellmeier Equation (for pure YVO₄ crystals):	n_o²=3.77834+0.069736/(l²-0.04724)-0.0108133.l² n_e²=4.59905+0.110534/(l²-0.04813)-0.0122676.l²
Stimulated emission cross-section:	25x 10^-19cm² @1064nm
Fluorescent lifetime:	90m s
Absorption coefficient:	31.4cm^-1 @810nm
Intrinsic loss:	0.02cm^-1 @1064nm
Gain bandwidth:	0.96nm @1064nm
Polarized laser emission:	p polarization; parallel to optic axis(c-axis)
Diode pumped optical to optical efficiency:	>60%

Laser Properties:

The Nd:YVO₄ crystal has large stimulated emission cross-sections at both 1064nm and 1342nm. The stimulated emission cross-section of an a-axis cut Nd:YVO₄ crystal at 1064nm is about 4 times higher than that of the Nd:YAG crystal. Although the lifetime of Nd:YVO₄ is about 2.7 times shorter than that of Nd:YAG. Because of its high pump quantum efficiency, the slope efficiency of Nd:YVO₄ can be very high if the laser cavity is properly designed. Table 1 lists the major laser properties of Nd:YVO₄ in comparison with those of Nd:YAG.

Table 1. Laser Properties of Nd:YVO₄

Laser crystal	Doping(atm%)	s(x10^-19cm²)	a (cm^-1)	t (ms)	l_a (mm)	P_th(mW)	h _s(%)
Nd:YVO₄(a-cut)	1.0 2.0	25 25	31.2 72.4	90 50	0.32 0.14	30 78	52 48.6
Nd:YVO₄(c-cut)	1.1	7	9.2	90		231	45.5
Nd:YAG	0.85	6	7.1	230	1.41	115	38.6

Diode pumped Nd:YVO₄ laser output comparing with diode pumped Nd:YAG laser.

Crystals	Size (mm³)	Pump Power	Output (at 1064nm)
Nd:YVO₄	3x3x1	850mW	350mW
Nd:YVO₄	3x3x5	15W	6W
Nd:YAG	3x3x2	850mW	34mW

Nd YVO4's Specification:

Nd: Dopant Level	0.1 - 3.0 atm%
Wavefront Distortion	< l/8 at 633 nm
Scattering Sites	invisible, probed with a He-Ne laser
Orientation	±0.5deg.
Dimensional Tolerance	±0.1mm
End-faces Configuration	Plano/Plano
Surface quality	10/5 Scratch/Dig per MIL-O-13830B
Flatness	l/10 at 633 nm
Clear Aperture	> Central 90%
Parallelism	< 10 arc sec.
Intrinsic Loss	< 0.1% cm^-1

Standard Products

Part No.	Doping	Dimension	Coating
NYV2301	2%	3x3x1mm	HR/AR Coating
NYV2302	2%	3x3x1mm	AR/AR Coating
NYV1301	1%	3x3x1mm	HR/AR Coating
NYV1305	1%	3x3x5mm	AR/AR Coating
NYV5310	0.5%	3x3x10mm	AR/AR Coating
NYV7408	0.27%	4x4x8mm	AR/AR Coating

AR/AR: S₁:AR@1064(R<0.1%)&532nm(R<0.5%) HT@808nm(R<5%); S₂:AR@1064&532nm
HR/AR: S₁:HR@1064(R>99.8%)&532nm(R>99%) HT@808nm(R<5%); S₂:AR@1064&532nm

Note: Other specifications of Nd:YVO₄ crystals and coatings are also available upon request.

DPM Crystal for Green Laser Pointer

Nd:YVO4+KTP for Green Laser Pointer

The most outstanding advantage of DPSS laser is its compact package, especially for Green Laser Pointer. CRYSTECH supply which combine Nd:YVO₄ crystal with KTP crystal, resulting in efficient, ultra-compact, diode pumped laser devices emitting the green laser. It greatly reduces your material cost and enhances assembling efficiency.

• Diode pumped Nd:YVO₄+KTP green laser point

Nd:YVO₄ (mm³)	KTP (mm³)	Pump Power	Output
2x2x1	2x2x3	150mW	>1mW
3x3x1	3x3x5	500mW	>20mW

Coating: S1: R>99.8% @1064 nm, R<5% @808 nm;S2: R>99.8% @1064 nm, R<5% @532 nm

Standard Products

Part No.	Nd:YVO4	KTP
PDM01	2x2x1	2x2x3mm
PDM02	2x2x1	2x2x5mm
PDM03	3x3x1	3x3x5mm

If you don't find what you're looking for, Contact Us. We may have a suitable product that's not listed, or we may be able to develop a material to fit your specific needs. Tel : (02)2755-1524 / Fax : (02)2704-4070