Nd:KGW
Nd: KGW crystal is a laser crystal that can realize high-concentration doping. Because the crystal can be mixed with high concentrations of Nd ions and has a large emission area, its monopulse and low-repeat laser performance is better than Nd: YAG. The absorption band of Nd: KGW crystal is at 808 nm, which can effectively couple with the LD pump source (emitting wavelength is 808 nm) to improve its luminous efficiency. Moreover, its half height and width of 12 nm allows it to accommodate the drift of LD emission wavelength with temperature, which is conducive to conducting diode-pumped KGw laser experiment and device research. Nd: KGW can realize free oscillation, Q switching, mode-locking operation, and Raman conversion.
Nd: KGW crystal—A crystal can be generated from excited Raman scattering and become a multi-wavelength light source in visible band after frequency doubling.
The Nd:KGW Crystal Has The Following Characteristics:
- High excited beam cross-section
- Low pumping threshold
- High output energy
- High conversion efficiency
- Two high Raman gain coefficients (768 and 901 cm-1)
Since the fundamental frequency light of Raman crystal is 911 nm, 1067 nm, and 1351 nm, the red, yellow, and blue light of 0.455 um, 0.533 um, and 65 um can be produced after frequency multiplication. It can be used in material processing, optical communication, tele-sensing, medicine, environmental monitoring, precision measurement, and other fields.
Features of Nd:KGW Crystal:
- High doping concentration
- Highly excited cross-section
- High Raman gain coefficient
- Good coupling with LD
- Wide absorption bandwidth
- Low lasing threshold
Physical Properties
| Nd Concentration | 2.2%(cw),3%(quasi-cw) |
| Fluorescence Lifetime | 130 μs |
| Stimulated Emission Cross Section | 3.7*10-19 cm2 |
| Transition Wavelength | 1067 nm |
| Thermal Conductivity | Ka=2.6 W/Km |
| Kb=3.8 W/Km | |
| Kc=3.4 W/Km | |
| dn / dT | 0.4*10-6 K-1 |
| Refractive Index@ 1.06μm | np=1.978 |
| nm=2.014 | |
| ng=2.049 | |
| Thermal Expansion Coefficient | (100):4*10-6 K-1 |
| (010):3.6*10-6 K-1 | |
| (001):8.5*10-6 K-1 | |
| Density（g * cm-3） | 7.248 |
| Specific Heat Capacity Cp | 500 Jkg-1K-1 |
Spectral Properties
| Laser Wavelength (nm) | 1067 |
| Emission Cross-section (pm2)2 | 32.3 |
| Gain Bandwidth (nm) | 2.73 |
| Fluorescence Lifetime (μs) | 130 at 3% doping |
| Thermal conductivity (Wm-1K-1） | ~3 |
Absorption and Emission Spectra
 |  |
 |
References
| [1] Kalisky Y Y , Scheps R , Hoffman H J , et al. Efficient diode-pumped Nd:KGW laser grown by top nucleated floating crystal method: Part II[J]. Proceedings of SPIE – The International Society for Optical Engineering, 2004, 5332:28-35. |
| [2] Graf T , Balmer J E . Lasing properties of diode-laser-pumped Nd:KGW[J]. Optical Engineering, 1995, 34(8):2349-2352. |
| [3] Demidovich A A , Shkadarevich A P , Danailov M B , et al. Comparison of cw laser performance of Nd:KGW, Nd:YAG, Nd:BEL, and Nd:YVO4 under laser diode pumping[J]. Applied Physics B, 1998, 67(1):11-15. |
| [4] Kushawaha V , Banerjee A , Major L . High-efficiency flashlamp-pumped Nd:KGW laser[J]. Applied Physics B, 1993, 56(4):239-242. |
| [5] Grabtchikov A S , Kuzmin A N , Lisinetskii V A , et al. Passively Q-switched 1.35 μm diode pumped Nd:KGW laser with V:YAG saturable absorber[J]. Optical Materials, 2001, 16(3):349-352. |
| [6] Musset O , Boquillon J P . Comparative laser study of Nd:KGW and Nd:YAG near 1.3 μm[J]. Applied Physics B, 1997, 64(4):503-506. |
| [7] Grabtchikov A S , Kuzmin A N , Lisinetskii V A , et al. Stimulated Raman scattering in Nd:KGW laser with diode pumping[J]. Journal of Alloys & Compounds, 2000, 300(none):300-302. |
| [8] Lisinetskii V A , Grabtchikov A S , Demidovich A A , et al. Nd:KGW/KGW crystal: efficient medium for continuous-wave intracavity Raman generation[J]. Applied Physics B, 2007, 88(4):499-501. |
| [9] Kushawaha V , Michael A , Major L . Effect of Nd Concentration on the Nd:KGW Laser[J]. APPLIED PHYSICS B LASERS AND OPTICS, 1994. |
| [10] Soulard R , Zinoviev A , Doualan J L , et al. Detailed characterization of pump-induced refractive index changes observed in Nd:YVO(4), Nd:GdVO(4) and Nd:KGW.[J]. Optics Express, 2010, 18(2):1553-68. |
| [11] Karlitschek P , Hillrichs G . Active and passive Q-switching of a diode pumped Nd:KGW-laser[J]. Applied Physics B, 1996, 64(1):21-24. |
| [12] Flood C J , Walker D R , Driel H . CW diode pumping and FM mode locking of a Nd: KGW laser[J]. Applied Physics B, 1995, 60(2-3):309-312. |
| [13] Kalisky Y , Kravchik L , Labbe C . Repetitive modulation and passively Q-switching of diode-pumped Nd-KGW laser[J]. Optics Communications, 2001, 189(1-3):113-125. |
| [14] Huang, Jianhong, Lin, et al. Short pulse eye-safe laser with a stimulated Raman scattering self-conversion based on a Nd:KGW crystal.[J]. Optics letters, 2007, 32(9):1096-8. |
| [15] R Moncorgé, Chambon B , Rivoire J Y , et al. Nd doped crystals for medical laser applications[J]. Optical Materials, 1997, 8(1-2):109-119. |
| [16] Halim M , Talukder R C , Waritanant T , et al. Passive mode-locking of Nd:KGW laser with hot band diode pumping[C]// 2016 Photonics North (PN). Laser Physics Letters, 2016. |
| [17] Kushawaha V , Yan Y , Chen Y . Efficiency of diode-pumped 1.35 m laser from Nd:KGW[J]. Applied Physics B, 1996, 62(5):533-535. |
| [18] Musset O , Boquillon J P . Flashlamp-pumped Nd:KGW laser at repetition rates up to 50 Hz[J]. Applied Physics B, 1997, 65(1):13-18. |
| [19] AA Demidovich, VA Lisinetskii, W Kiefer,等. Continuous-wave Raman generation in a diode-pumped Nd~(3+):KGd(WO_(4))_(2) laser. |
| [20] Abdolvand A , Wilcox K G , Kalkandjiev T K , et al. Conical refraction Nd:KGd(WO4)2 laser[J]. Optics Express, 2010, 18(3):2753. |
| [21] Yumashev K V , Savitski V G , Kuleshov N V , et al. Laser performance of N g -cut flash-lamp pumped Nd:KGW at high repetition rates[J]. Applied Physics B, 2007, 89(1):39-43. |
| [22] Esmeria J M , Ishii H , Sato M , et al. Efficient continuous-wave lasing operation of Nd:KGd(WO4)2 at 1.067 μm with diode and Ti:sapphire laser pumping[J]. Optics Letters, 1995, 20(14):1538-40. |
| [23] Atanasov P A , Tomov R I , Perrie?Re J , et al. Growth of Nd:potassium gadolinium tungstate thin-film waveguides by pulsed laser deposition[J]. Appl.phys.lett, 2000, 76(18):2490-2492. |
| [24] Major A , Langford N , Graf T , et al. Diode-pumped passively mode-locked Nd:KGd(WO4)2 laser with 1-W average output power[J]. Optics Letters, 2002, 27(16):1478. |
| [25] Stankov K A , Marowsky G . High-efficiency multicolor Q-switched Nd3+:KGd(WO4)2 laser[J]. Applied Physics B, 1995, 61(2):213-215. |
| [26] Chen Y , Major L , Kushawaha V . Efficient laser operation of diode-pumped Nd:KGd(WO4)2 crystal at 1.067 μm[J]. Applied Optics, 1996, 35(18):3203-3206. |
| [27] Bogdanovich M V , Grigor’Ev A V , Lantsov K I , et al. A high-power optical parametric oscillator based on a master Nd : KGW laser with a high repetition rate[J]. Quantum Electronics, 2017, 47(4):308-312. |
If you are intereted in Nd:KGW, please click the button below to enquire or ask for a samplel.
Related article(s) with Nd:KGW:
Related case study with Nd:KGW:
There is no related case study with this product, please visit case study page to find out more.
Related solution(s) with Nd:KGW:
There is no related application(s) with this product, please visit solutionspage to find out more.
Related video(s) with Nd:KGW:
There is no related video(s), please visit videos page to find out more.