公开(公告)号：US20240405505A1

公开(公告)日：2024-12-05

申请号：US18205340

申请日：2023-06-02

Applicant: Applied Optoelectronics, Inc.

Inventor： Dapeng XU ,  Klaus Alexander ANSELM ,  Nahid Sultana

IPC: H01S5/02 ,  H01S5/028 ,  H01S5/10 ,  H01S5/22 ,  H01S5/40

Abstract: Methods of manufacturing edge-emitting lasers include cleaving a semiconductor wafer along one or more streets formed on the wafer. A street is an extended region formed without dielectric and metal layers and may be formed on the semiconductor wafer, for example, by a selective wet etching process or a dry etching process. Cleaving along the street(s) without dielectric and metal layers achieves cleaved facets, which are substantially free from microstep defects and metal contamination. After cleaving, a dielectric material may be provided on the remaining street portions along the ends of the cleaved facets, for example, by intentional overspray deposition of facet coatings.

公开(公告)号：US20240204484A1

公开(公告)日：2024-06-20

申请号：US18084896

申请日：2022-12-20

Applicant: Applied Optoelectronics, Inc.

Inventor： Dapeng XU ,  Klaus Alexander ANSELM ,  Huanlin ZHANG

IPC: H01S5/20 ,  H01S5/02 ,  H01S5/227

CPC classification number: H01S5/2054 ,  H01S5/0206 ,  H01S5/2275 ,  H01S5/34

Abstract: A multi-section semiconductor optical amplifier (SOA) includes at least two sections in series—an input section at an input side and an output section at an output side—with the input section having a higher optical confinement (also referred to as a high gamma) and the output section having a lower optical confinement (also referred to as a low gamma). The input section may also have a shorter length than the output section. The multi-section structure allows optimizing the input side and the output side design separately such that the input section provides a high gain section configured to quickly increase optical power and the output section provides a low differential gain section that improves saturation. As a result, the multi-section SOA can achieve higher output power with high gain and lower signal noise while demanding low input power.