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Cobra-Stretch系列纳秒脉冲染料激光
Cobr-Stretcha系列纳秒脉冲染料激光器是Sirah公司推出的标准版染料激光器,采用光栅调谐波长,振荡级/预放级,放大级(选配)的双染料池结构。具有60mm或90mm长,1800/2400/3000线多种光栅可以选择,以及双光栅选项。最大泵浦能量:800mJ@532nm,500mJ@355nm。
Cobr-Stretcha具有结构可靠,重复精度高,转换效率高达30%等诸多优点。
Cobr-Stretcha具有丰富的选配功能:
- EBP毛细管圆光斑染料池,改善输出光斑质量
- 倍频/差频等频率扩展附件,波长可覆盖197nm-5.2 μm(详见《波长扩展选件》)
- Grating Lift选件,可选装两块不同线数的光栅,实现在线自动更换光栅
- PWC压电陶瓷波长高速切换器,可在两个波长下高速切换,最大切换速度30Hz,最大波长跳跃2.6nm
- DBO双线宽转换选件,可以切换染料激光器线宽到大约3.6倍,满足即需要窄线宽,也需要宽线宽的应用
- Double Dye双染料激光器选项,将两台染料激光器集成在一个机箱内,结构紧凑,占用空间小,可靠性好
主要技术参数
Dispersion Option |
Tuning Range |
Linewidth |
Efficiency |
Three Quartz Prisms |
370..920 nm |
0.15 nm 1) 5 cm-1 @ 570 nm |
30 % 2) |
1800 lines / mm, 60 mm |
400..920 nm |
3.6 pm 0.1 cm-1 @ 625 nm |
30 % 3) |
1800 lines / mm, 90 mm |
400..920 nm |
2.4 pm 0.06 cm-1 @ 625 nm |
30 % 3) |
2400 lines / mm, 60 mm |
370..760 nm |
2.7 pm 0.08 cm-1 @ 570 nm |
30 % 2) |
2400 lines / mm, 90 mm |
370..760 nm |
1.8 pm 0.06 cm-1 @ 570 nm |
30 % 2) |
3000 lines / mm, 60 mm |
370..620 nm |
2.0 pm 0.06 cm-1 @ 570 nm |
30 % 2) |
3000 lines / mm, 90 mm |
370..620 nm |
1.4 pm 0.05 cm-1 @ 570 nm |
30 % 2) |
Dual 1800 lines / mm |
410..900 nm |
1.7 pm 4) 0.05 cm-1 @ 625 nm |
27 % 3) |
Dual 2400 lines / mm |
370..710 nm |
1.2 pm 4) 0.04 cm-1 @ 570 nm |
27 % 2) |
Dual 3000 lines / mm |
370..580 nm |
1.0 pm 4) 0.03 cm-1 @ 570 nm |
27 % 2) |
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Absolute Wavelength Accuracy |
< 15 pm (prism models: 0.5 nm) |
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Wavelength Resetability |
< 2 pm (prism models: 0.05 nm) |
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Wavelength Stability |
< 1,5 pm / °C (prism models: 10 pm / °C) |
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Divergence (typical) |
1.0 mrad (0.4 mrad with main amplifier) |
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Polarization |
> 98 % (vertical) |
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ASE |
< 0.5 % |
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Pump Energies |
8..150 mJ @ 532 nm, resonator, pre-amplifier only |
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8..80 mJ @ 355 nm, resonator, pre-amplifier only |
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50..650 mJ @ 532 nm, with main amplifier (800 mJ5)) |
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50..400 mJ @ 355 nm, with main amplifier (500 mJ5)) |
1) for wavelength < 660 nm
2) resonator and pre-amplifier at 570 nm (peak Rhodamine 6G) pumped at 532 nm
3) resonator and pre-amplifier at 625 nm (peak DCM) pumped at 532 nm
4) exact linewidth depends weakly on wavelength; value given for 450 nm
5) with enhanced beam profile (capillary) EBP dye cell
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