Self-Assembled Quantum Dots for High-Performance Broadband Optical Coherence Tomography Sources

Entities Mentioned

• University of Sheffield
• Ziyang Zhang

1. 

   Feature Of The Week 2/22/09. The development of low-cost, compact, and high-power broadband sources for OCT applications is a very interesting research area being pursued in a number of research laboratories and companies around the world. Superluminescent light emiting diodes (SLEDs), in particular, have made tremendous progress towards a commercializable low-cost source for point of care screening and diagnostics OCT systems. Self-assembled quantum dots (SAQD) are a new and exciting class of nanomaterials which are leading to a revolution in the development of high power and broadband SLEDs, most recently by utilizing their natural broad emission spectra due to the large dot sizes inhomogeneity. Dr. Ziyang Zhang et al from the University of Sheffield have done a lot of interesting work on the investigation of high performance QD-SLEDs. In his most recent publications, post-growth annealed multiple SAQD layer structures are demonstrated as very effective in fabricating broadband QD-SLEDs. This figure contains two images corresponding to two kinds of L-I curves and emission spectra of two different QD-SLEDs: one is working at around 1 µm and the other is at around 1.3 µm. One device exhibits a 3 dB emission bandwidth of 146 nm centered at 984 nm with cw output power as high as 15 mW at room temperature corresponding to an small coherence length of 6.6 µm. Another device in the 1.3 µm range exhibits a large and flat emission with spectral width up to 132 nm at 2 mW. For more information, please see article 1 and article 2. Submit your image using feedback link below.

   Bookmark or Share this article

   
   

   Related Articles

   • Fourier Domain a Hugh Boost to Optical Coherence Tomography for Cardiovascular Applications
   • also written by Eric Swanson (eric)
   • Fiber-optic amplification of light pulses
   • also categorized in Broadband Sources
   • Shedding New Light on Early Caries Detection with Optical Coherence Tomography
   • also written by Eric Swanson (eric)
   • PhD Studentship
   • also mentions University of Sheffield
   • David W. Kolstad appointed President and Chief Executive Officer of LightLab Imaging
   • also published in Optical Coherence Tomography News

   • MEMS micromirror with dual-reflective surfaces for circumferential scanning endoscopic OCT imaging
   • also written by Eric Swanson (eric)
   • NTT Introduces a High-output, High-bandwidth Super Luminescent Diode Light Source Ideal for In-vivo Optical Coherence Tomography
   • also categorized in Broadband Sources
   • High-power SLED delivers broad spectrum
   • also mentions Ziyang Zhang
   • Production of tuneable picosecond light pulses in a visible spectral range
   • also categorized in Broadband Sources
   • Polarization-Sensitive Optical Coherence Tomography Imaging of Demineralization on Tooth Surfaces
   • also written by Eric Swanson (eric)

Login to comment.