LDTLS Laser Driven Tunable Light Sources

Laser-Driven Tunable Light Sources

High Brightness, Tunable Sources with Fiber-Coupled Output


The Laser-Driven Tunable Light Source (LDTLS™) is a compact, fully integrated and highly stable tunable broadband light source based on proven Laser-Driven Light Source (LDLS™) technology. The LDTLS™ family utilizes the EQ-9, EQ-77 and EQ-400 LDLS™ broadband sources and features the highest brightness and output flux available in a tunable broadband light source.

Designed with high throughput applications in mind, the LDTLS can be run continuously and has an extremely long bulb lifetime of more than 9,000 hours. It has high stability, very low noise and is coupled with a precision high-performance monochromator for accurate wavelength selection and repeatable light output across the broad range of 400nm-1100nm.

The spectral resolution can be customized for application specific purposes and ranges in bandwidth from 1nm to 10nm. The fiber coupled output is both flexible and convenient for delivering wavelength selected light precisely where it is needed.

Tunable Light Source at Photonics West 2019

Energetiq LDTLS™ Products

Compare characteristics and specifications of our Laser-Driven Tunable Light Source products.







Operating Wavelength Range

400nm–1100nm 350nm–1100nm 750nm–1100nm

Wavelength Accuracy

+/- 0.5nm +/- 0.5nm +/- 0.5nm

Spectral Resolution

User selectable: 1.0nm-8.0nm Factory pre-set: 1.0nm-8.0nm Factory pre-set: 4.0nm-8.0nm

Scan speed

< 15ms for a 2nm step < 15ms for a 2nm step < 15ms for a 2nm step

Typical In-band Flux
(For ~6.5nm FWHM)

400nm: 1mW
600nm: 1mW
750nm: 0.4mW
1000nm: 0.2mW
400nm: 4.5mW
600nm: 3.0mW
750nm: 2.0mW
1000nm: 0.75mW
400nm: N/A
600nm: N/A
750nm: 3.0mW
1000nm: 2.0mW

Optical Output Interface

Optical fiber output via SMA
connector, NA = 0.39

Optical fiber output via SMA
connector, NA = 0.39

Optical fiber output via SMA
connector, NA = 0.39



35.6 x 27 x 23.3 cm
14 x 10.7 x 9.17 in


26.6 x 43.2 x 22.2 cm
10.5 x 17 x 8.7 in

15.2 x 25 x 13.2 cm
6 x 9.8 x 5.2 in

34.9 x 33 x 21.6 cm
13.7 x 13 x 8.5 in

133 x 483 x 584 mm
5.2 x 19.0 x 23.0 in

Facility Requirements


100-240 VAC, 50/60 Hz 100-240 VAC, 50/60 Hz 200-240 VAC, 50/60 Hz

Cooling System

Active air-cooling 1.0 Liter/min (0.27gal/min)
(available from Energetiq)
3.0-4.0 Liter/min (0.81-1.1 gal/min) (available from Energetiq)

Purge Nitrogen

Not Required 0.4 Liter/min (recommended) 0.7 Liter/min (recommended)


Class 1 Class 1 Class 4