David Sandquist

Title: David Sandquist - Innovator in VCSEL Technology

Introduction

David Sandquist is a notable inventor based in Saint Paul, MN (US). He has made significant contributions to the field of optoelectronics, particularly in the development of vertical-cavity surface-emitting lasers (VCSELs). His innovative approach to power monitoring in VCSEL devices has garnered attention in the industry.

Latest Patents

David Sandquist holds a patent for a "Power monitoring approach for VCSELS and VCSEL arrays." This patent presents a method for monitoring the output power of a VCSEL or VCSEL array within a compact and low-profile package. The invention includes a configuration where a photodiode is used to monitor the output power of one or more VCSELs. In certain embodiments, the VCSEL devices are arranged over a photodetector, allowing the photodetector to detect light emitted through the bottom of the VCSEL. Additionally, the design may incorporate a patterned bottom metal layer or an etched substrate to facilitate light passage to the photodiode. Other embodiments involve a photodetector positioned on a submount adjacent to the VCSELs, configured to detect light reflected via a diffuser for output power monitoring.

Career Highlights

David Sandquist is currently employed at Vixar, Inc., where he continues to advance his research and development efforts in VCSEL technology. His work has been instrumental in enhancing the performance and efficiency of optoelectronic devices.

Collaborations

Throughout his career, David has collaborated with talented individuals such as Klein L Johnson and Mary K Brenner. These collaborations have contributed to the successful development of innovative technologies in the field.

Conclusion

David Sandquist's contributions to VCSEL technology exemplify his commitment to innovation in optoelectronics. His patent on power monitoring approaches showcases his ability to address industry challenges effectively. His work at Vixar, Inc. continues to influence the advancement of this critical technology.