Device for measuring distances
AssigneeSafran Vectronix AG
InventorChristian Ban
Life of this patent
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Abstract
The inventive Device is comprising a laser rangefinder for determining the distance along a laser axis between the device and a target object. The laser rangefinder is comprising a pumping laser and a thulium and/or holmium doped fiber laser with a thulium and/or holmium doped fiber section and two Bragg gratings arranged on both sides of the thulium and/or holmium doped fiber section of the thulium and/or holmium doped fiber laser wherein the thulium and/or holmium doped fiber laser is pumped by the pumping laser and configured to emit laser light with a wavelength in the range of 1900 nm to 2150 nm. The inventive device has an improved applicability.
Claims14
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 device comprises an integrated coaxial laser pointer wherein the laser pointer comprises a single mode pigtailed pointer diode emitting at a wavelength different from the laser rangefinder wavelength and coupled to the main optical path of the laser rangefinder by means of a fused Wavelength Division Multiplexer or coupler, respectively.
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.
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 laser rangefinder comprises a Distributed Feed-Back (DFB) laser diode emitting laser light at a wavelength around 2000 nm and being connected to a pumping connection of the thulium and/or holmium doped fiber laser wherein the Distributed Feed-Back laser is configured to form a pulse trains by gain switching or modulation, respectively, of the drive current applied to the 2000 nm laser diode.
Dependencies are inferred from the claim text.