# US 2024/0198451 A1 · Fiber output hybrid laser system

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- Number: US 2024/0198451 A1
- Document ID: US20240198451A1
- Status: Published application
- Kind: A1
- Application number: 18/068,846
- Filed: 2022-12-20
- Published: 2024-06-20
- Earliest claimed: 2022-12-20
- Assignees: Turning Point Lasers Corporation
- Applicants: Turning Point Lasers Corporation
- Inventors: CHI LUEN WANG; HUNG SHENG LEE; YI SHIN SU; SHIH WEI LIN; SZUTSUN SIMON OU
- Web page: https://patentgrep.com/patent/US20240198451A1

## CPC

- B23K 26/0617: {and with spots spaced along the common axis}
- G02B 6/04: formed by bundles of fibres (G02B6/24 takes precedence)
- G02B 6/262: {Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements}
- G02B 6/4296: {coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources}
- H01S 3/094003: {the pumped medium being a fibre}
- H01S 3/09415: {the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping}
- H01S 5/02251: using optical fibres
- H01S 5/4012: {Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms}
- H01S 5/4025: {Array arrangements, e.g. constituted by discrete laser diodes or laser bar (H01S5/42 takes precedence)}
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL

## Abstract

A fiber output hybrid laser system, which having at least a blue ray laser model, emitting a blue ray laser beam; an infrared optic fiber laser module, emitting an infrared laser beam; a fiber bundle combining the above mentioned two laser beams, an output optical assembly collimating the laser beams, and generating focal points of two wavelengths; wherein the blue ray laser beam and the infrared laser beam which are coaxial and coincident to emit light, and the BPP of the blue ray laser beam and the infrared laser beam are both less than 10 mm*mrad; the power of the blue ray laser beam is between 20˜100 W, the power of the infrared laser beam is between 500˜5000 W, so as to obtain the best welding and cladding effects.

## Claims

### Claim 1

A fiber output hybrid laser system, comprising:
at least a blue ray laser model, emitting a blue ray laser beam through a blue ray optic fiber;
an infrared optic fiber laser module, emitting an infrared laser beam through an infrared optic fiber;
a fiber bundle, which being used for embedding the blue ray optic fiber and the infrared optic fiber, and emitting an output light beam through an output optic fiber;
an output optical assembly having a collimating lens and a focusing lens arranged at front and back, wherein the collimating lens is used to form the output light beam into a collimated parallel beam; and the focusing lens will make the passing parallel beam generating focal points of two wavelengths, which are a first focus and a second focus; and
the output light beam generated by the output fiber, including the blue ray laser beam and the infrared laser beam which are coaxial and coincident to emit light, and the BPP of the blue ray laser beam and the infrared laser beam are both less than 10 mm*mrad; and through the adjustment of the focusing lens, the first focus of the blue ray laser beam will be formed on the surface of a material to be processed, and the second focus of the infrared laser beam will be penetrate into the material to be processed, and the distance between the first focus and the second focus is 1-3 mm, so as to obtain the best welding and cladding effects.

### Claim 2 (depends on 1)

The fiber output hybrid laser system as claimed in claim 1, wherein the blue ray laser model has at least 7 blue ray laser diodes to excite at least 7 blue ray light beams with a wavelength of 400 nm˜670 nm, an optical lens assembly, including at least 7 fast axis collimating lenses, slow axis collimating lenses, reflecting lenses and a focusing lens, so that the individual blue ray light beams are respectively collimated through each of the fast axis collimating lenses and each of the slow axis collimating lenses, and after passing through each of the reflecting lenses, then combined into a blue ray laser beam, and the blue ray laser beam can be coupled into the core of the blue ray optic fiber through the action of the focusing lens.

### Claim 3 (depends on 1)

The fiber output hybrid laser system as claimed in claim 1, wherein the infrared optical fiber laser module having a seeding light source device, which uses an infrared laser diode to emit a seeding laser beam with a wavelength of 1064 nm, and an excitation light source device, which uses a high-power semiconductor laser, so as to emit an excitation laser beam with a wavelength of 800˜980 nm, a beam combiner, which is used to couple the seeding laser beam and the excitation laser beam into the core of the infrared optical fiber, so as to form the infrared laser beam, and a fiber amplifier amplifies the energy of the infrared laser beam.

### Claim 4 (depends on 1)

The fiber output hybrid laser system as claimed in claim 1, wherein the output optic fiber has a core diameter of 100 μm and a cladding of 300 μm.

### Claim 5 (depends on 1)

The fiber output hybrid laser system as claimed in claim 1, wherein the blue ray laser beam in the output light beam having a wavelength between 400 nm˜480 nm, and the power is between 20˜100 W, and the infrared laser beam in the output light beam having a wavelength between 900 nm˜1100 nm, and the power is between 500˜5000 W.