DescriptionSpecifications
Models
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Spectra-Physics’ state-of-the-art pulsed dye laser systems are German engineered by our partner firm Sirah GmbH for precision, stability and reliability. At the heart of the laser system is a grazing incidence resonator designed to utilize the grating’s dispersion twice per oscillator round-trip, ensuring narrow linewidths with low ASE. An optional second grating can be added to the resonator for ultra-narrow linewidths below 0.03 cm-1 at 570 nm. The resonator allows narrow-line tuning over a broad tuning range without the need for an intra-cavity etalon or grating change, thus simplifying the measurement process without sacrificing performance.
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Cobra |
Spectra-Physics’ pulsed dye laser systems are available in three models that differ mainly in their output energies and the availability of accessories such as harmonic generation and wavelength separation. The Cobra, featuring a full range of oscillator choices and a single preamplifier stage, is designed for low energy applications from 5 to 20 mJ. |
Cobra-Stretch |
The Cobra-Stretch meets output energy needs up to 250 mJ. Based on a two-stage design, the Cobra-Stretch can accommodate an extra amplifier stage to obtain higher powers or a frequency conversion unit to extend the range of wavelengths, either of which is conveniently housed inside the main cabinet. |
PrecisionScan |
The PrecisionScan is Spectra-Physics’ top-end pulsed dye laser system. Configured with three stages, the PrecisionScan provides the versatility to accommodate two main amplifiers for high-energy applications ranging from >400 mJ of pump energy at 355 nm and >650 mJ at 532 nm; or can alternatively house an additional frequency conversion unit for frequency doubling capabilities. Enhanced with standard dual wavelength optics, switching between 532 and 355 nm pump lasers becomes a straightforward procedure. |
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Applications |
Laser induced fluorescence- Lidar and remote sensing
- Combustion and atmospheric studies
- Laser spectroscopy
- Cavity ringdown spectroscopy
- CARS
- Photolysis
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Cobra Dye Laser Specifications
| Linewidth Specifications |
| Oscillator Dispersion Option | Tuning Range | Linewidth | Efficiency |
| Three Quartz Prisms | 370–900 nm | 0.15 nm1 | 5 cm-1 @ 570 nm | 20%2 |
| Diffraction Gratings | |
| Lines per mm | Grating Length (mm) | |
| 1800 | 60 | 400–900 nm | 3.6 pm | 0.1 cm-1 @ 625 nm | 10%3 |
| 1800 | 90 | 400–900 nm | 2.4 pm | 0.06 cm-1 @ 625 nm | 10%3 |
| 2400 | 60 | 350–740 nm | 2.7 pm | 0.08 cm-1 @ 570 nm | 9%2 |
| 2400 | 90 | 350–740 nm | 1.8 pm | 0.06 cm-1 @ 570 nm | 9%2 |
| 3000 | 60 | 350–610 nm | 2.0 pm | 0.06 cm-1 @ 570 nm | 9%2 |
| 3000 | 90 | 350–610 nm | 1.4 pm | 0.05 cm-1 @ 570 nm | 9%2 |
| Dual 1800 | 90 | 410–900 nm | 1.7 pm4 | 0.05 cm-1 @ 625 nm | 8%3 |
| Dual 2400 | 90 | 350–710 nm | 1.2 pm4 | 0.04 cm-1 @ 570 nm | 8%2 |
| Dual 3000 | 90 | 350–580 nm | 1.0 pm4 | 0.03 cm-1 @ 570 nm | 8%2 |
| Wavelength and Beam Characteristics |
| Absolute Wavelength Accuracy | <30 pm (prism models: 0.5 nm) |
| Wavelength Resetability | <5 pm (prism models: 0.05 nm) |
| Wavelength Stability | <2 pm/°C (prism models: 10 pm/°C) |
| Divergence (typical) | 1 mrad |
| Polarization | >98% (vertical) |
| ASE | <0.5% |
| Pump Energies (grating models) | 8–150 mJ @ 532 nm
8–130 mJ @ 355 nm |
| Pump Energies (prism models) | 8–230 mJ @ 532 nm
8–210 mJ @ 355 nm |
| Requirements |
| Voltage | 110–230 V, single phase, 50 Hz/60 Hz |
| Computer | One serial port (RS-232, 9 pin connector) |
| Operating System | Windows 2000 / Windows XP / Windows Vista (32 bit) |
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
Cobra-Stretch Dye Laser Specifications
| Linewidth Specifications |
| Oscillator Dispersion Option | Tuning Range | Linewidth | Efficiency |
| Three Quartz Prisms | 370–900 nm | 0.15 nm1 | 5 cm-1 @ 570 nm | 20%2 | -- |
| Diffraction Gratings | |
| Lines per mm | Grating Length (mm) | |
| 1800 | 60 | 400–900 nm | 3.6 pm | 0.1 cm-1 @ 625 nm | 10%4 | 28%5 |
| 1800 | 90 | 400–900 nm | 2.4 pm | 0.06 cm-1 @ 625 nm | 10%4 | 28%5 |
| 2400 | 60 | 350–740 nm | 2.7 pm | 0.08 cm-1 @ 570 nm | 9%2 | 27%3 |
| 2400 | 90 | 350–740 nm | 1.8 pm | 0.06 cm-1 @ 570 nm | 9%2 | 27%3 |
| 3000 | 60 | 350–610 nm | 2.0 pm | 0.06 cm-1 @ 570 nm | 9%2 | 26%3 |
| 3000 | 90 | 350–610 nm | 1.4 pm | 0.05 cm-1 @ 570 nm | 9%2 | 26%3 |
| Dual 1800 | 90 | 410–900 nm | 1.7 pm6 | 0.05 cm-1 @ 625 nm | 8%4 | 25%5 |
| Dual 2400 | 90 | 350–710 nm | 1.2 pm6 | 0.04 cm-1 @ 570 nm | 8%2 | 25%3 |
| Dual 3000 | 90 | 350–580 nm | 1.0 pm6 | 0.03 cm-1 @ 570 nm | 8%2 | 25%3 |
| Wavelength and Beam Characteristics |
| Absolute Wavelength Accuracy | <30 pm (prism models: 0.5 nm) |
| Wavelength Resetability | <5 pm (prism models: 0.05 nm) |
| Wavelength Stability | <2 pm/°C (prism models: 10 pm/°C) |
| Divergence (typical) | 1 mrad (0.5 mrad with main amplifier) |
| Polarization | >98% (vertical) |
| ASE | <0.5% |
| Pump Energies (grating models) | 8–150 mJ @ 532 nm
8–130 mJ @ 355 nm |
| Pump Energies (prism models) | 8–230 mJ @ 532 nm
8–210 mJ @ 355 nm |
| Pump Energies (with main amplifier) | 50–650 mJ @ 532 nm
50–400 mJ @ 355 nm |
| Requirements |
| Voltage | 110–230 V, single phase, 50 Hz/60 Hz |
| Computer | One serial port (RS-232, 9 pin connector) |
| Operating System | Windows 2000 / Windows XP / Windows Vista (32 bit) |
1. For <660 nm wavelength
2. Resonator and pre-amplifier at 570 nm (peak Rhodamine 6G) pumped at 532 nm
3. Resonator, pre- and main amplifier at 570 nm (peak Rhodamine 6G) pumped at 532 nm
4. Resonator and pre-amplifier at 625 nm (peak DCM) pumped at 532 nm
5. Resonator, pre- and main amplifier at 625 nm (peak DCM) pumped at 532 nm
6. Exact linewidth depends weakly on wavelength; value given for 450 nm
PrecisionScan Dye Laser Specifications
| Linewidth Specifications |
| Diffraction Gratings | Tuning Range | Linewidth | Efficiency |
| Lines per mm | Grating Length (mm) | |
| 1800 | 60 | 400–900 nm | 3.6 pm | 0.1 cm-1 @ 625 nm | 28%1 |
| 1800 | 90 | 400–900 nm | 2.4 pm | 0.06 cm-1 @ 625 nm | 28%1 |
| 2400 | 60 | 350–740 nm | 2.7 pm | 0.08 cm-1 @ 570 nm | 27%2 |
| 2400 | 90 | 350–740 nm | 1.8 pm | 0.06 cm-1 @ 570 nm | 27%2 |
| 3000 | 60 | 350–610 nm | 2.0 pm | 0.06 cm-1 @ 570 nm | 26%2 |
| 3000 | 90 | 350–610 nm | 1.4 pm | 0.05 cm-1 @ 570 nm | 26%2 |
| Dual 1800 | 90 | 410–900 nm | 1.7 pm3 | 0.05 cm-1 @ 625 nm | 25%1 |
| Dual 2400 | 90 | 350–710 nm | 1.2 pm3 | 0.04 cm-1 @ 570 nm | 25%2 |
| Dual 3000 | 90 | 350–580 nm | 1.0 pm3 | 0.03 cm-1 @ 570 nm | 25%2 |
| Wavelength and Beam Characteristics |
| Absolute Wavelength Accuracy | <30 pm |
| Wavelength Resetability | <5 pm |
| Wavelength Stability | <2 pm/°C |
| Divergence (typical) | 0.5 mrad |
| Polarization | >98% (vertical) |
| ASE | <0.5% |
| Pump Energies (grating models) | 50–650 mJ @ 532 nm
50–400 mJ @ 355 nm
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| Pump Energies (with 2nd main amplifier) | 180–1400 mJ @ 532 nm
180–1000 mJ @ 355 nm |
| Requirements |
| Voltage | 110–230 V, single phase, 50 Hz/60 Hz |
| Computer | One serial port (RS-232, 9 pin connector) or USB port |
| Operating System | Windows 2000 / Windows XP / Windows Vista (32 bit) |
1. At 625 nm (peak DCM) pumped at 532 nm
2. At 570 nm (peak Rhodamine 6G) pumped at 532 nm
3. Exact linewidth depends weakly on wavelength; value given for 450 nm