Vijaysekhar Jayaraman

Monolithic integration of refractive lenses with vertical-cavity lasers and detectors for optical interconnections

We present a technique for monolithic integration of vertical cavity lasers and detectors with refractive microlenses etched on the back side of the semiconductor substrate in a wafer-scale process. This integration provides collimated or focused laser beam sources for applications in free-space interconnections or for coupling to optical fibers, and it improves the collection efficiency of detectors.

10-Gb/s VCSEL-based data links

Standards activities for the next generation of Ethernet, 10 Gigabit Ethernet, are underway. Vertical Cavity Surface Emitting Lasers (VCSELs) offer significant advantages for realizing cost-effective, high speed optical data links. The progress towards achieving 10 Gb/s VCSEL-based links is reviewed.

High temperature 1300 nm VCSELs for single-mode fiber-optic communication

Gore Photonics has reported a new long-wavelength VCSEL structure that employs an electrically pumped short-wavelength VCSEL optical pump to drive a 1300 nm VCSEL, as an alternative to direct current injection. In this paper, we provide an update on the recent progress of devices using this structure. In addition to improving power, temperature performance, and speed, our efforts have been focused on making reliable, mechanically robust devices compatible with standard packages.

Long-wavelength vertical-cavity laser research at Gore

Vertical cavity surface emitting lasers (VCSELs) operating near 1310 or 1550 nm have been the subject of intensive research by multiple groups for several years. In the past year at Gore, we have demonstrated the first 1300 nm VCSELs which operate with useful power, high modulation rate, and low voltage over the commercial temperature range of 0 - 70 degree(s)C. These results have been achieved using a new structure in which an 850 nm VCSEL optical pump is integrated with the 1300 nm VCSEL. Electrical drive is applied to the 850 nm pump, and 1300 nm light is emitted from the integrated structure. This approach has resulted in over a milliwatt of single transverse mode power at room temperature, and several hundred microwatts of single transverse mode power at 70 degree(s)C. In addition, these devices demonstrate multi-gigabit modulation and excellent coupling efficiency to single-mode fiber.

High temperature continuous wave 1300 nm vertical cavity lasers

Vertical cavity surface-emitting lasers (VCSELs) operating at 1310/1550 nm have many potential applications in emerging fiber-optic networks. We describe 1300 nm VCSELs with an integrated 850 nm VCSEL optical pump. Large multi-mode devices exhibit 2 mW room temperature CW (RTCW) power, and CW operation to 700 C, while smaller single-mode devices show 1.3 mW RTCW power with CW operation to 800 C.

1300 nm VCSELs with Integrated Optical Pump for High-Speed Fiber-OpticCommunications

In the last several years, 850 nm vertical cavity surface-emitting lasers (VCSELs) have emerged as a viable communication source, in short distance multi-mode datalinks.