US 11,860,521 B2
Light source with photoluminescence emitter
Volker Hagemann, Nieder-Olm (DE); and Albrecht Seidl, Niedernberg (DE)
Assigned to SCHOTT AG, Mainz (DE)
Filed by SCHOTT AG, Mainz (DE)
Filed on Jul. 2, 2020, as Appl. No. 16/919,246.
Claims priority of application No. 10 2019 118 060.0 (DE), filed on Jul. 4, 2019.
Prior Publication US 2021/0003909 A1, Jan. 7, 2021
Int. Cl. G03B 21/20 (2006.01); C09K 11/77 (2006.01); G03B 33/12 (2006.01); G03B 21/06 (2006.01); G03B 21/16 (2006.01)
CPC G03B 21/204 (2013.01) [C09K 11/7794 (2013.01); G03B 21/16 (2013.01); G03B 33/12 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A light source, comprising:
a laser operable to emit laser light at a wavelength in a range from 460 nanometers to 470 nanometers;
a laser light wavelength stabilizer that comprises an active loop control with a loop control circuit that stabilizes the laser at an absorption wavelength of Eu3+ ions; and
a converter assembly arranged to convert the laser light to photoluminescent light having a longer wavelength than the laser light,
wherein the converter assembly comprises a converter element doped with Eu3+ such that under irradiation of the laser light the converter assembly emits photoluminescent light in a red spectral range.