Tunable laser
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A tunable laser is a laser whose wavelength of operation can be altered in a controlled manner. While all laser gain media allow small shifts in output wavelength, only some types of lasers allow cont
CW dye laser based on Rhodamine 6G. The dye laser is considered to be the first broadly tunable laser.
A typical laser diode. When mounted with external optics, these lasers can be tuned mainly in the red and near-infrared.
Titanium-sapphire laser
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A titanium-sapphire laser is a tunable laser which emits red and near-infrared light in the range from 650 to 1100 nanometers. This type of laser is mainly used in scientific research because of its t
Tunable laser
…1972. Dye lasers and some vibronic solid-state lasers have extremely large bandwidths, allowing tuning over a range of tens to hundreds of nanometres. Titanium-doped sapphire is the most common tunable solid-state laser, capable of laser operation from 670 nm to 1,100 nm wavelengths. Typically these laser systems incorporate…
Part of a Ti:sapphire oscillator. The Ti:sapphire crystal is the bright red light source on the left. The green light is from the pump diode.
The inner optical setup of a femtosecond Ti-sapphire pulsed laser
A Ti:Sapphire crystal in the centre of a multipass amplifier Quantronix Odin is pumped by 5W green beam (faintly visible coming from right), amplifies femtosecond pulses that pass it several times under different angles (invisible on the photo) and loses part of energy as red fluorescence light.
Femtosecond pulses generate multiple angle-resolved colour patterns when focused; note their fan-out angle is even higher than that of the focused laser beam