US 2025/0233384 A1 · CONVERSION ELEMENT WITH POROUS LAYER

Abstract

This specification discloses a converter element and light emitting devices including the converter element. The converter element is monolithic with at least two layers, where one layer is more porous than the other layer. The converter element may be integrated with a reflector layer, such as by metallization. The layer of the converter structure that is denser and having a smoother surface may be the one that is metallized, while the more porous layer is closer to the laser. The porosity enhances light extraction while the smoother surface decreases a loss of reflectivity at the reflector-phosphor interface. The converter element may be used in a laser based light emitting device.

Claims15

Dependent claims

A wavelength converting structure, comprising:

a first layer comprising a first surface, a second surface opposite the first surface, and side surfaces connecting the first and second surfaces, the first layer comprising a first phosphor material and pores in the first phosphor material, the first phosphor material configured to absorb light of a first wavelength and emit light of a second wavelength;
a second layer comprising a first surface, a second surface opposite the first surface, and side surfaces connecting the first and second surfaces, the first surface of the second layer in direct contact with the first surface of the first layer, the second layer comprising the first phosphor material and having a lesser porosity than the first layer.

Dependencies are inferred from the claim text.

Facts

Application

19/095,757Filed 31 Mar 2025

Priority

21 Oct 2022

Published

17 Jul 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

H01S 5/0087
Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating…:…
H10H 20/8515
Wavelength conversion means: not being in contact with the bodies
H01S 5/0611
Acting on an absorbing region, e.g. wavelength convertors: wavelength convertors
H01S 5/125
The resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers: distributed Bragg reflector [DBR] lasers

Conversion element with porous layer

Life of this patent

Conversion element with porous layer

Life of this patent

Abstract

Claims15