They use an Erbium or Ytterbium doped fiber on which a FBG (Fiber Bragg Grating) is written. By construction, this laser is naturally single-frequency. Such type of laser is then also tunable, via thermal control over several nm without any mode hopping. It is pumped, thanks a multiplexer, by a laser diode operating @ 980 nm.
The optical output is isolated in order to avoid any light feedback which could pertubate the laser. A PM type is also available.
The driver integrates three main functions :
RS232 version is available only on benchtop laser.
|Output power||Up to 10 mW|
|Available wavelength||1020-1200 nm 1525-1610 nm|
|Wavelength stability||±1 pm peak to peak|
|Output power stability||Dérive ≤ 5 %|
|Magnitude stability (20 kHz – 2 GHz)||±1.5 % rms|
|Spectrum||Single-frequency FWHM ≤ 20 kHz|
|Polarisation ratio||> 25 dB|
|Package||OEM – Benchtop|