This inventor holds 3 USPTO granted patents and 5 published patent applications. Active years: 2026.
Years Active: 2026
Title: Innovations of Siva Kumar Lanka in VCSEL Technology
Introduction
Siva Kumar Lanka is an accomplished inventor based in Reno, NV (US). He has made significant contributions to the field of vertical-cavity surface-emitting laser (VCSEL) technology. With a total of 3 patents to his name, his work focuses on enhancing the performance and efficiency of VCSEL arrays.
Latest Patents
One of Siva Kumar Lanka's latest patents is titled "Systems and methods for series-connected VCSEL array." This invention describes a VCSEL array that comprises series-connected VCSEL sub-arrays formed on a single chip. Each VCSEL sub-array includes VCSEL emitters fabricated on a semi-insulating layer. The design features a common cathode contact of a VCSEL sub-array that is electrically connected to a common anode contact of a neighboring VCSEL sub-array. To minimize leakage, the bandgap energy level of the semi-insulating layer is higher than the photon energy of the output beam. In one embodiment, the semi-insulating layer is grown on a conductive layer, with the last VCSEL sub-array's common cathode contact connected to this conductive layer. Additionally, multiple wire-bonding areas are electrically connected to common anode contacts of multiple VCSEL sub-arrays, providing different input impedance options for the VCSEL array.
Another notable patent is "VCSEL array with non-isolated emitters." This invention comprises a plurality of non-isolated VCSEL emitters, each featuring a first reflector region, a current confining oxide layer, an oxide aperture, an active region, and a second reflector region. The current confining oxide layer and oxide aperture are created by oxidizing a relatively high Al-content layer through separate oxidation holes that surround the oxide aperture. The first and second reflector regions of the non-isolated VCSEL structures are interconnected, ensuring they are not completely isolated from one another.
Career Highlights
Siva Kumar Lanka's career is marked by his innovative approach to VCSEL technology. His patents reflect a deep understanding of semiconductor physics and laser technology, contributing to advancements in optical communication and sensing applications.
Collaborations
Throughout his career, Siva Kumar Lanka has collaborated with notable colleagues, including Yang Wang and Yongxiang He. Their joint efforts have further propelled advancements in VCSEL technology.
Conclusion
Siva Kumar