High Power GaInAsP/InP Strained Quantum Well Superluminescent Diode with Tapered Active Region

Abstract

High-power broadband superluminescent diodes (SLDs) have been studied for spectrum-sliced multiwavelength light sources for use in wavelength division multiplexing systems. We present the design and fabrication of high-power broadband GaInAsP/InP strained quantum well SLDs with a tapered active region emitting in a 1.55 µm wavelength band. The fabricated device exhibited the high-power operation of over 1 W. Also, the spectral width has been increased to over 60 nm by using chirped multiquantum wells which have different well thicknesses.

High-Power Quantum-Dot Superluminescent Diodes With p-Doped Active Region

“…SLDs not only find application in OCT but also in fiber-optic gyroscopes, sensors, and optical components testing. Several semiconductor structures have been proposed so far for SLDs, exploiting single quantum wells [2], chirped quantum wells [3], [4], or bulk materials [5] as active medium. Recently quantum-dot (QD) devices are attracting an increasing interest in this field [6]- [10].…”

InAs Quantum Dots of Engineered Height for Fabrication of Broadband Superluminescent Diodes

“…To fabricate a superluminescent diode, a ridge waveguide tilted by 5-8º off the normal facet is typically used to avoid lasing. It has been also reported (Koyama et al, 1993;Yamatoya et al, 1999) that to lower the effective reflectivity of the device facets, SLED fabricated into a tilted and tapered waveguide can be realized. Such a geometry improves the saturation output power and the quantum efficiency.…”

High performance intermixed p-doped quantum dot superluminescent diodes at 1.2 [micro sign]m

“…The device exhibits a high output power of above 190 mW with 80 nm bandwidth.Introduction: Superluminescent diodes (SLDs) are very attractive for many applications such as optical coherence tomography (OCT), and fibre-optic based gyroscopes [1,2]. While the 1.2 mm region is a typical wavelength of minimal absorption and scattering in human tissue, ideal for medical applications [3], 1.2 mm SLDs are also of significant interest for pumping thulium doped tellurite fibre lasers/ amplifiers with high efficiency and lower temperature sensitivity compared to conventional pump lasers [4].…”