Underwater laser light source

Patent metadata

Field	Value
Publication number	US-10566763-B2
Application number	US-201916292659-A
Country	US
Kind code	B2
Filing date	Mar 5, 2019
Priority date	Mar 29, 2018
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

An underwater laser source is used in water and comprises a water pressure-resistant cylinder A having a light emission window 4 , and the water pressure-resistant cylinder A comprises a plurality of semiconductor lasers 11 a - 11 f , and converging lens 13 that converges each laser light from the plurality of semiconductor lasers 11 a - 11 f , and emits converged each laser light to the light emission window 4.

First claim

What is claimed is:

1. An underwater laser source, that is used in water, comprising:
a water-pressure resistant cylinder having a light emission window, wherein said water pressure-resistant cylinder further comprises:
a plurality of semiconductor lasers; and
a converging lens that converges each laser light emitted from said plurality of semiconductor lasers inside said water pressure-resistant cylinder, wherein said converging lens emits each converged laser light through said light emission window.

2. The underwater laser source, according to claim 1 , further comprising:
an optical fiber; wherein each laser light converged through said converging lens is incident to said optical fiber that emits each incident laser light through said light emission window.

3. The underwater laser source, according to claim 2 , wherein:
said plurality of semiconductor lasers are in-place contacting with a first end of said water pressure-resistant cylinder, said light emission window is in-place at a second end of said water pressure-resistant cylinder facing said first end, and said emission end of said optical fiber is in-place nearby said light emission window.

4. The underwater laser source, according to claim 1 , wherein:
said plurality of semiconductor lasers comprises a plurality of semiconductor laser groups, and a center wavelength thereof differs from each other.

5. An underwater laser source, that is used in water, comprising:
a water-pressure resistant cylinder having a light emission window; wherein said water pressure-resistant cylinder further comprises:
a single semiconductor laser;
a converging lens that converges laser lights emitted from said single semiconductor laser;
an optical fiber to which a converged laser light through said converging lens is incident; and
a laser light coming out from said optical fiber is emitted into water through said light emission window.

6. The underwater laser source, according to claim 5 , wherein:
said single semiconductor lasers are in-place contacting with a first end of said water pressure-resistant cylinder, said light emission window is in-place at a second end of said water pressure-resistant cylinder facing said first end, and an emission end of said optical fiber is in-place nearby said light emission window.

7. The underwater laser source, according to claim 1 , wherein:
a central wavelength of said semiconductor lasers is in a range of 350 nm to 850 nm.

Assignees

• Shimadzu Corp

Inventors

• Nishi Ryosuke
• Tojo Koji
• Nishimura Naoki

Classifications

• H01S5/005

  Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping (H01S5/026, H01S5/18388 take precedence) · CPC title

• H01S5/4087

  emitting more than one wavelength · CPC title

• B23K26/122

  in a liquid, e.g. underwater · CPC title

• H01S5/4025

  Array arrangements, e.g. constituted by discrete laser diodes or laser bar (H01S5/42 takes precedence) · CPC title

• H01S5/02469 Primary

  Passive cooling, e.g. where heat is removed by the housing as a whole or by a heat pipe without any active cooling element like a TEC · CPC title