Laser light source module and laser light source device

Patent metadata

Field	Value
Publication number	US-9966729-B2
Application number	US-201414475914-A
Country	US
Kind code	B2
Filing date	Sep 3, 2014
Priority date	Feb 13, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A laser light source module includes: a plate-shaped stem; a power supply lead pin having an upper end protruding from an upper surface being one of main surfaces of the stem and a lower end penetrating to extend toward a lower surface side, the lower surface being the other of the main surface of the stem; a block fixed to the upper surface of the stem; a submount substrate that is fixed to a surface of the block and includes the semiconductor laser array mounted thereon, the surface being parallel to the upper surface of the stem; the semiconductor laser array located on the submount substrate such that a light emitting direction is parallel to the upper surface of the stem; and a collimator lens array that is located on a front surface of the semiconductor laser array and converts an output light beam of the semiconductor laser array into a parallel light beam.

First claim

What is claimed is:

1. A laser light source module, comprising:
a plate-shaped stem;
a power supply lead pin that serves as a power supply line for a semiconductor laser array, said power supply lead pin having an upper end protruding from an upper surface being one of main surfaces of said stem and a lower end penetrating to extend toward a lower surface side, the lower surface being the other of the main surface of said stem;
a block fixed to the upper surface of said stem;
a submount substrate that is fixed to a surface of said block and includes said semiconductor laser array mounted thereon, the surface being parallel to the upper surface of said stem;
said semiconductor laser array located on said submount substrate such that a light emitting direction is parallel to the upper surface of said stem; and
a collimator lens array that is located on a front surface of said semiconductor laser array and converts an output light beam of said semiconductor laser array into a parallel light beam,
wherein said collimator lens array is fixed to a surface of said block, the surface being vertical to the upper surface of said stem,
side surfaces of said stem have positioning notches and fixing notches,
said positioning notches are provided in a pair at both end portions of a side surface of said stem on a front direction side of said light emitting direction,
said fixing notches are provided in a pair on side surfaces of said stem on side direction sides of said light emitting direction, and
said fixing notches have a semicircular shape in a plan view such that if two laser light source modules are positioned adjacent to each other in an array arrangement, the adjacent fixing notches form a circle.

2. The laser light source module according to claim 1 , wherein when said laser light source module is disposed on a fixing base, said positioning notches are fitted to positioning protrusions located on said fixing base to define a position of said laser light source module to be disposed on said fixing base.

3. The laser light source module according to claim 1 , wherein
said submount substrate has an electrode pattern formed thereon, and
the upper end of said power supply lead pin is electrically connected to said electrode pattern through a power supply ribbon.

4. The laser light source module according to claim 1 , wherein said block is manufactured by wire-cut electric discharge machining.

5. The laser light source module according to claim 1 , wherein
said collimator lens array has a shape elongated in an array arrangement direction of said semiconductor laser array, and
said collimator lens array is fixed to said block at a single one spot of an end portion in a longitudinal direction with an adhesive.

6. A laser light source device, comprising:
a fixing base; and
a plurality of the laser light source modules, fixed on said fixing base, wherein
each laser light source module includes
a plate-shaped stem;
a power supply lead pin that serves as a power supply line for a semiconductor laser array, said power supply lead pin having an upper end protruding from an upper surface being one of main surfaces of said stem and a lower end penetrating to extend toward a lower surface side, the lower surface being the other of the main surface of said stem;
a block fixed to the upper surface of said stem;
a submount substrate that is fixed to a surface of said block and includes said semiconductor laser array mounted thereon, the surface being parallel to the upper surface of said stem;
said semiconductor laser array located on said submount substrate such that a light emitting direction is parallel to the upper surface of said stem; and
a collimator lens array that is located on a front surface of said semiconductor laser array and converts an output light beam of said semiconductor laser array into a parallel light beam, wherein
said collimator lens array is fixed to a surface of said block, the surface being vertical to the upper surface of said stem,
side surfaces of said stem have positioning notches and fixing notches,
said positioning notches are provided in a pair at both end portions of a side surface of said stem on a front direction side of said light emitting direction,
said fixing notches are provided in a pair on side surfaces of said stem on side direction sides of said light emitting direction, and
said fixing notches have a semicircular shape in a plan view such that when two laser light source modules are positioned adjacent to each other in an array arrangement, the adjacent fixing notches form a circle,

said plurality of laser light source modules are linearly located side by side in an array arrangement direction of said semiconductor laser array,
said fixing base includes, for each of said laser light source modules:
a lead pin through hole into which said power supply lead pin is inserted;
a pair of positioning protrusions that fit to said positioning notches provided in a pair; and
a pair of screw holes that overlap said fixing notches provided in a pair in a plan view in a state where said pair of positioning protrusions fit to said positioning notches provided in a pair,

in a state where said pair of positioning protrusions fit to said positioning notches provided in a pair, said screw holes are fastened with screws from above said fixing notches to fix said laser light source module to said fixing base, and
said laser light source modules located adjacent to each other share said screw hole on the adjacent side.

7. The laser light source device according to claim 6 , wherein
said fixing base has a plurality of steps,
said plurality of steps are parallel to one another,
on each of said plurality of steps, said plurality of laser light source modules are linearly located side by side in the array arrangement direction of said semiconductor laser array, and
said laser light source device further comprises a condensing lens that condenses light beams emitted from said laser light source modules to one point.

Assignees

• Mitsubishi Electric Corp

Inventors

• Yabe Mitoru

Classifications

• H01S5/405

  Two-dimensional arrays · 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

• H01S5/02476

  Heat spreaders, i.e. improving heat flow between laser chip and heat dissipating elements · CPC title

• H01S5/4012

  Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms · CPC title

• H01S5/4043

  with vertically stacked active layers · CPC title