US 11,942,990 B2
Tunable laser based light source
Joris Jan Vrehen, Waalre (NL); Hugo Johan Cornelissen, Escharen (NL); Chin Wan Oh, Eindhoven (NL); and Johan-Paul Marie Gerard Linnartz, Eindhoven (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 17/911,443
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Mar. 8, 2021, PCT No. PCT/EP2021/055720
§ 371(c)(1), (2) Date Sep. 14, 2022,
PCT Pub. No. WO2021/185608, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 20163505 (EP), filed on Mar. 17, 2020.
Prior Publication US 2023/0105180 A1, Apr. 6, 2023
Int. Cl. H04B 10/50 (2013.01); H04B 10/116 (2013.01)
CPC H04B 10/116 (2013.01) [H04B 10/503 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A tunable laser based light source for Li-Fi communication comprising:
a laser for emitting, in operation, a scanning beam,
a first optical element configured to reflect and/or refract the scanning beam emitted from the laser, and
a second optical element configured to broaden the scanning beam reflected/refracted by the first optical element,
wherein the scanning beam is configured to scan a scanning area,
wherein the scanning area is extending with a first scanning length in a broadening direction and a second scanning length in a scanning direction,
wherein the broadening direction and the scanning direction are mutually perpendicular,
wherein the second optical element is configured to broaden the scanning beam in the broadening direction to a width larger than the first scanning length, and
wherein the laser and the first optical element are configured to cooperate to enable the scanning beam to be swept along the scanning direction.