Patent ID: 11867840
Assignee: SAFRAN VECTRONIX AG
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 11:
12. Device for measuring distances, comprising:
a laser rangefinder for time-of-flight based distance determination along a laser axis between the device and a target object, the laser rangefinder comprising a laser transmission channel and a laser receiver channel, wherein the laser rangefinder comprises a pumping laser, a thulium and/or holmium doped fiber laser with a thulium and/or holmium doped fiber section in between two Bragg gratings and an emitting connection, wherein the thulium and/or holmium doped fiber laser is pumped by the pumping laser and configured to output laser light with a wavelength in the range of 1900 nm to 2150 nm, wherein the pumping laser connected to the thulium and/or holmium doped fiber laser includes a single mode master laser diode, at least one amplifying Er/Yb co-doped fiber and a pumping diode wherein the at least one amplifying Er/Yb codoped fiber is receiving light from the single mode master laser diode and is pumped by the pumping diode and wherein the pumping laser is a pulsed pumping laser wherein the single mode master laser diode and the pumping diode are synchronously pulsed and the pulsed pumping laser is a Master Oscillator Power Amplifier (MOPA) configured to emit pulse trains suitable for the laser rangefinder wherein the pulse length is in the order of one ns to few tens of ns and the laser wavelength is around 1555 nm at room temperature.