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Tunable Narrow Bandwidth Pulsed Lasers

Sirah’s pulsed dye laser are the standard for all applications in atomic and molecular spectroscopy.
Features are:

Precision Mechanics: Ultimate Wavelength Accuracy
Perfect Engineering: User Friendly, Reliable Operation
Maximum Performance: High Pulse Energies
Automatic Grating Exchange: No Gaps in Tuning-Range, Allways Optimal Efficiency
Handheld Remote Control
Operation from Both Sides
Tool-Free Exchange of Dye Cells
Integrated Autotracker

Cobra

All Dimensions in mm. Specifications are subject to change without notice.

CobraStretch

All Dimensions in mm. Specifications are subject to change without notice.

PrecisionScan

All Dimensions in mm. Specifications are subject to change without notice.

Double Dye

All Dimensions in mm. Specifications are subject to change without notice.All Dimensions in mm. Specifications are subject to change without notice.

Literature & Downloads

Datasheet Cobra (PDF)

Datasheet Cobra-Stretch (PDF)

Datasheet PrecisionScan (PDF)

Datasheet Double Dye Laser (PDF)

Datasheet Piezo Wavelength Control (PDF)

Datasheet Grating Lift (PDF)

Datasheet Double Bandwidth (PDF)

Linewidth Specifications

	Cobra	Cobra-Stretch	Cobra / Cobra-Stretch	Cobra	Cobra-Stretch
Dispersion Option	Tuning Range		Linewidth	Efficiency
Three Quartz Prisms	370..920 nm	370..920 nm	0.15 nm ¹⁾ 5 cm^-1 @ 570 nm	24 % ²⁾	30 % ²⁾
1800 lines / mm, 60 mm	400..920 nm	400..920 nm	3.6 pm ⁴⁾ 0.1 cm^-1 @ 625 nm	12 % ³⁾	30 % ²⁾
1800 lines / mm, 90 mm	400..920 nm	400..920 nm	2.5 pm ⁴⁾ 0.07 cm^-1 @ 625 nm	12 % ³⁾	30 % ²⁾
2400 lines / mm, 60 mm	350..760 nm	370..760 nm	2.7 pm ⁴⁾ 0.08 cm^-1 @ 570 nm	12 % ³⁾	30 % ²⁾
2400 lines / mm, 90 mm	350..760 nm	370..760 nm	1.8 pm ⁴⁾ 0.06 cm^-1 @ 570 nm	12 % ³⁾	30 % ²⁾
3000 lines / mm, 60 mm	350..620 nm	370..620 nm	2.0 pm ⁴⁾ 0.07 cm^-1 @ 530 nm	12 % ³⁾	30 % ²⁾
3000 lines / mm, 90 mm	350..620 nm	370..620 nm	1.4 pm ⁴⁾ 0.05 cm^-1 @ 530 nm	12 % ³⁾	30 % ²⁾
Dual 1800 lines / mm	410..900 nm	410..900 nm	1.7 pm ⁴⁾ 0.05 cm^-1 @ 625 nm	10 % ³⁾	27 % ³⁾
Dual 2400 lines / mm	370..710 nm	370..710 nm	1.2 pm ⁴⁾ 0.04 cm^-1 @ 530 nm	10 % ³⁾	27 % ³⁾
Dual 2400 lines / mm	370..580 nm	370..580 nm	1.0 pm ⁴⁾ 0.04 cm^-1 @ 500 nm	10 % ³⁾	27 % ³⁾

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⁾ value given for 450 nm

PrecisionScan / Double Dye
Dispersion Option	Tuning Range	Linewidth	Efficiency
1800 lines / mm, 60 mm	400..920 nm	3.6 pm ⁴⁾ 0.1 cm^-1 @ 625 nm	30 % ²⁾
1800 lines / mm, 90 mm	400..920 nm	2.4 pm ⁴⁾ 0.06 cm^-1 @ 625 nm	30 % ²⁾
2400 lines / mm, 60 mm	370..760 nm	2.7 pm ⁴⁾ 0.08 cm^-1 @ 570 nm	30 % ²⁾
2400 lines / mm, 90 mm	370..760 nm	1.8 pm ⁴⁾ 0.06 cm^-1 @ 570 nm	30 % ²⁾
3000 lines / mm, 60 mm	370..620 nm	2.0 pm ⁴⁾ 0.06 cm^-1 @ 570 nm	30 % ²⁾
3000 lines / mm, 90 mm	370..620 nm	1.4 pm ⁴⁾ 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 @ 625 nm	27 % ²⁾
Dual 3000 lines / mm	370..580 nm	1.0 pm ⁴⁾ 0.03 cm^-1 @ 570 nm	27 % ²⁾

²⁾ at 570 nm (peak Rhodamine 6G) pumped at 532 nm
³⁾ at 625 nm (peak DCM) pumped at 532 nm
⁴⁾ value given for 450 nm

Wavelength and Beam Characteristics

	Cobra	Cobra-Stretch
Absolute Wavelength Accuracy	< 15 pm (prism models: 0.5 nm)	< 15 pm (prism models: 0.5 nm)
Wavelength Resetability	< 2 pm (prism models: 00.5 nm)	< 2 pm (prism models: 0.05 nm)
Wavelength Stability	< 1.5 pm / °C (prism models: 10 pm / °C)	< 1,5 pm / °C (prism models: 10 pm / °C)
Divergence (typical)	1 mrad	1.0 mrad (0.4 mrad with main amplifier)
Polarization	> 98 % (vertical)	> 98 % (vertical)
ASE	< 0.5 %	< 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		8..150 mJ @ 532 nm, resonator, pre-amplifier only 8..80 mJ @ 355 nm, resonator, pre-amplifier only 50..650 mJ @ 532 nm, with main amplifier (800 mJ⁵⁾) 50..400 mJ @ 355 nm, with main amplifier (500 mJ⁵⁾)

⁵⁾ with enhanced beam profile (capillary) dye cell

	PrecisionScan	Double Dye
Absolute Wavelength Accuracy	< 15 pm	< 20 pm
Wavelength Resetability	< 2 pm	< 4 pm
Wavelength Stability	< 1.5 pm / °C	< 2 pm / °C
Divergence (typical)	0.4 mrad	0.5 mrad
Polarization	> 98 % (vertical)	> 98 % (vertical)
ASE	< 0.5 %	< 0.5 %
Pump Energies (grating models)
Pump Energies (prism models)
Pump Energies	50 .. 650 mJ @ 532 nm (800 mJ ⁴⁾) 50 .. 400 mJ @ 355 nm (500 mJ ⁴⁾) 300 .. 1400 mJ @ 532 nm with 2^nd main amplifier 300 .. 1000 mJ @ 355 nm with 2^nd main amplifier	50 .. 650 mJ @ 532 nm (800 mJ ⁴⁾) 50 .. 400 mJ @ 355 nm (500 mJ ⁴⁾)

⁴⁾ with enhanced beam profile (capillary) dye cell

Requirements

	Cobra / Cobra-Stretch / PrecisionScan / Double Dye
Voltage	110..230 V, single phase, 50 Hz / 60 Hz
Computer Control	XP / Vista / Windows 7 / Windows 8 / Windows 10 (32 & 64 bit), USB port

Options

	Cobra	Cobra-Stretch	PrecisionScan	Double Dye
Main amplifier for higher output energy
Double wavelength pump optic (532 nm, 355 nm)
Frequency doubling / mixing units (external housing)
Autotracking frequency doubling / mixing units (external housing)
External mixing units
Automatic exchange of gratings
Second main amplifier for higher output energy
Internal autotracking frequency doubling
Internal open loop frequency doubling / mixing units (with 2^nd main amplifier: external housing)
Piezo wavelength control
Dynamic mode option
Double bandwidth option