US 12,136,796 B2
Electro-absorption modulated laser with integrated filter layer
Dapeng Xu, Houston, TX (US); Jin Huang, Sugar Land, TX (US); and Huanlin Zhang, Sugar Land, TX (US)
Assigned to Applied Optoelectronics, Inc., Sugar Land, TX (US)
Filed by Applied Optoelectronics, Inc., Sugar Land, TX (US)
Filed on Aug. 18, 2021, as Appl. No. 17/405,416.
Prior Publication US 2023/0053516 A1, Feb. 23, 2023
Int. Cl. H01S 3/10 (2006.01); H01S 5/026 (2006.01); H01S 5/065 (2006.01); H01S 5/12 (2021.01); H01S 5/20 (2006.01); H01S 5/22 (2006.01); H01S 5/343 (2006.01); H01S 5/028 (2006.01)
CPC H01S 5/0265 (2013.01) [H01S 5/026 (2013.01); H01S 5/0653 (2013.01); H01S 5/12 (2013.01); H01S 5/2022 (2013.01); H01S 5/22 (2013.01); H01S 5/34326 (2013.01); H01S 5/028 (2013.01); H01S 5/2054 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electro-absorption modulated laser (EML) to emit a predetermined channel wavelength, the EML comprising:
a substrate;
a distributed feedback (DFB) section provided by a first plurality of layers disposed on the substrate;
an electro-absorption modulator (EAM) section provided by a second plurality of layers disposed on the substrate;
an active region provided by the DFB section and the EAM section;
a filter layer disposed between the substrate and the active region, the filter layer comprising a material with an energy band gap less than an energy bandgap of the predetermined channel wavelength.