Active Member
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[China]
Address: No.200, Zgaoxian Road, Jiading Zone, Shanghai, China
Contact name:sales
Nanjing Crylink Photonics Co.,Ltd |
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Yb-doped CaGdAlO4 crystal (Yb:CALGO) is now recognized to exhibit outstanding properties for the production of high-power and ultra-short laser pulses. It has the broad and smooth emission bandwidth to generate very short pulses (<100 fs). Additionally its’ high thermal conductivity make it is able to hold high power pumping(2 at. % Yb:CALGO thermal conductivity to be 6.9 and 6.3 WK1 m1 along the a and c axis); The generation of both very short pulse and high average power femtosecond oscillators has been demonstrated
Yb3+:CaGdAlO4 has been recently demonstrated to be very interesting for the development of diodepumped short-pulsed modelocked lasers. Compared with Ti: Sapphire crystal(the choice for the development of ultrashort laser system producing very short and powerful pulses using the Chirped Pulse Amplification techniqueSince the beginning of the 90’s),Yb:CALGO can be directly pumped by very efficient and high power semiconductor laser.( Titanium Sapphire crystal pumped by green laser)
| Doping Concentration | 1-10% |
| Parallelism | 10 |
| Perpendicularity | 10 |
| Surface Quality | 20/10 |
| Surface Flatness | </10@632.8nm |
| Clear Aperture | >90% |
| Chamfer | 0.1mm@45° |
| Thickness/Diameter Tolerance | ±0.05 mm |
Physical and Chemical Properties
| Formula | Yb:CaGdAlO4 (Yb:CALGO) |
| Crystal Structure | Tetragonal K2NiF4 type structure |
| Melting Point | 1840°C |
| Thermal Conductivity/(Wm-1K-1) | 11.4(undoped) 6.3(2% Yb:CALGO) 5(5% Yb:CALGO) |
| Thermal Shock Resistance(W.m-1/2) | >4.5 |
| Thermal Expansion /(10-6K-1 ) | 35 |
Optical and Spectral Properties
| Emission band width* (FWHM) (nm) | 80 |
| Emission Wavelength(nm) | 1018-1052 |
| Minimum theoretical duration (fs) | 14 |
| Central emission peak (nm) | 1050 |
| Absorption(usual pumping) (nm) | 980 |
| Emission cross section(10-20 cm2) | 0.8 |
| Fluorescence lifetime (s) | 420 |
| em (scm2) | 336 |
| Quantum Defect | <0.8% |
| Material | Emission band width(FWHM) (nm) | Minimum theoretical duration (fs) | Central emi ssion peak (nm) | Absorption (usual pumping) (nm) |
| Yb:YAG | 9 | 124 | 1031 | 942 |
| Yb:Glass | 35 | 31 | 1020 | 975 |
| Yb:GdCOB | 44 | 26 | 1044 | 976 |
| Yb:BOYS | 60 | 18 | 1025 | 975 |
