Stabilised Laser Source from 530 nm to 785 nm
The era of HeNe lasers seems to be over. In measurement technology, history’s first cw laser has been replaced by novel wavelength-stabilised laser systems.
Stabilised laser sources are required for different applications, for example in Raman spectroscopy, confocal spectroscopy, interferometry, lithography, and fluorescence measurements. In the past, HeNe lasers were used for these tasks, but alternatives are now taking over the market: wavelength-stabilised diode lasers are more compact and more efficient.
In just a short period of time, our partner PD-LD has introduced two new products: single-mode series SLM (647nm to 785nm) and GB530 (530nm). They supplement the existing LML multi-mode source.
Stabilized to ±0.5 nm.
All models use the proven Volume Bragg GratingTM technology to stabilise the laser wavelength at an accuracy of a maximum of 0.5 nm and to stabilise the line width to a maximum of 0.08 nm.
Equipment
The laser sources are available in different models. In addition to the free space version, there are versions available with a single-mode or multi-mode fibre. The wavelengths on offer are diverse as well. Depending on the model, they range from 530 nm to 6xx nm to 785 nm.
The systems include an integrated driver, an operating voltage of only 5V, and modulation up to 100 kHz can be achieved. Depending on the model, the optical output power varies between 50 mW to 500 mW.
Additional features of the laser sources include the integrated monitor diode, Peltier cooling elements, and a USB interface for direct control via a PC.
VBGTM Lasers
Laser diodes are inexpensive and offer a high efficiency but at the expense of a large bandwidth. A Bragg grating forces the laser diode into a specific mode into which the entire power enters. This decreases the bandwidth of the laser to that of the Bragg grating. With the help of Volume Bragg TechnologyTM, inexpensive lasers with a high efficiency can be produced.
