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Lasers Shed White Light on Microscopy

May 2008
TOPTICA Photonics AGRequest Info
• pulse length <100 fs
• repetition rate 80 to 110 MHz
• wavelength 1050 to 2100 nm

Toptica-Photonics_IMG_0393_Rainbow.jpgToptica Photonics AG has brought out three white-light lasers for microscopy and biophotonics applications, including multiphoton excitation and time-resolved photon counting. The FemtoFiber lasers also have applications in frequency measurement and in femtosecond and terahertz spectroscopy.

The infrared supercontinuum laser, the FFS.SYS-CONT, outputs light over the wavelength range of 1050 to 2100 nm, with a typical total power of 150 mW. It has a pulse length <100 fs between 1700 and 2100 nm, with an average power in that range of 5 to 40 mW. The repetition rate is factory-set between 80 and 110 MHz. The beam divergence is wavelength-dependent but below 1 mrad, and the beam shape is TEM00. The lasers are designed for flexibility in scientific applications, and the addition of the FFS-COMP compression module produces shorter pulses of <40 fs for wavelengths less than 1400 nm. By frequency doubling the infrared supercontinuum, the company has developed a narrow-band, widely tunable version in the visible region that provides high power per nanometer and good power stability. With a bandwidth of 1 nm and a tuning range from 485 to 700 nm, it produces power between 1 and 10 mW.

The laser head dimensions are 318 × 236 × 122 mm, and the add-on module measures 258 × 227 × 122 mm. The laser has a USB interface and takes a supply voltage of 90 to 260 VAC, from 47 to 63 Hz.


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