What Determines the Output Wavelength of a Fiber Laser

The output wavelength of a fiber laser is determined by the gain medium, that is, what kind of doped fiber is selected. The two most common wavelengths are 1064 nm and 1550 nm, respectively.

  A typical Er3+ fiber laser is tunable at 14 nm at 1536 and 1550nm.

 Taking an Nd3+-doped quartz fiber laser as an example, an AlGaAs (aluminum gallium arsenide) semiconductor laser with a wavelength of 808 nm is used as a pump source, and the laser emission wavelength of the fiber laser is 1064 nm.

 Fiber Laser refers to a laser using a rare earth-doped glass fiber as a gain medium. Fiber lasers can be developed on the basis of fiber amplifiers. Under the action of pump light, high power density is easily formed in the fiber, resulting in laser The laser energy level of the working substance "particle number inversion" can form a laser oscillation output when a positive feedback loop (constituting a resonant cavity) is appropriately added.