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Topic Area: Optoelectronics
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31. Lateral variations in self-assembled InGaAs quantum dot distributions
Topic: Optoelectronics
Published: 6/26/2009
Authors: Alexana Roshko, Todd E Harvey, Brittany L Hyland, Lehman Y Susan, Keith D Cobry
Abstract: The lateral uniformity of self-assembled InGaAs quantum dots grown by molecular beam epitaxy(MBE) was assessed as a function of growth conditions. Variations in the dot density and height were determined from atomic force micrographs. Growth rate h ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32815

32. Electron Microscope Study of Strain in InGaN Quantum Wells in GaN Nanowires
Topic: Optoelectronics
Published: 4/1/2009
Authors: Roy Howard Geiss, David Thomas Read
Abstract: GaN nanowires with InGaN quantum wells (QW) were grown on heated Si(111) substrates by molecular beam epitaxy (MBE) using elemental Ga and In and a radio-frequency-plasma N2 source. The growth procedures and the morphology of these nanowires have bee ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902327

33. EEEL Technical Accomplishments
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7568
Topic: Optoelectronics
Published: 3/30/2009
Author: Erik M Secula
Abstract: This document describes the technical work of the Electronics and Electrical Engineering Laboratory. In this report, you will find that EEEL researchers are developing the world's most advanced sensors, providing advanced gamma ray imagers for astro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901701

34. Optical Performance Monitoring Using Artificial Neural Networks Trained with Parameters Derived from Delay-Tap Asynchronous Sampling
Topic: Optoelectronics
Published: 3/20/2009
Authors: Jeffrey A Jargon, Xiaoxia Wu, Alan Willner
Abstract: We demonstrate a technique for optical performance monitoring by simultaneously identifying optical signal-to-noise ratio (OSNR), chromatic dispersion (CD), and polarization-mode dispersion (PMD) using artificial neural networks trained with paramete ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33186

35. Calculation of pulse parameters and propagation of uncertainty
Topic: Optoelectronics
Published: 3/1/2009
Authors: Paul D Hale, Chih-Ming Wang
Abstract: The fundamental starting point for the analysis of all two-state waveforms is the determination of the low- and highstate levels. This is a two-step process. First, the data are grouped into points belonging to each state, and second, the value of ea ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32782

36. Measuring optical waveforms with fiber frequency combs
Topic: Optoelectronics
Published: 1/5/2009
Authors: Ian R Coddington, William C Swann, Nathan Reynolds Newbury
Abstract: A stabilized frequency comb provides a broadband array of highly resolved comb lines. Using a multiheterodyne technique, we measure the amplitude and phase of every comb line, allowing for massively parallel, high-resolution optical sampling.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900153

37. Optical performance monitoring using artificial neural networks trained with eye-diagram parameters
Topic: Optoelectronics
Published: 1/1/2009
Authors: Jeffrey A Jargon, Xiaoxia Wu, Alan Willner
Abstract: We developed artificial neural network models to simultaneously identify three separate impairments that can degrade optical channels, namely optical signal-to-noise ratio, chromatic dispersion, and polarization mode dispersion. The neural networks w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33016

38. Reflective optical chopper used in NIST high-power laser measurements
Series: Journal of Research (NIST JRES)
Topic: Optoelectronics
Published: 11/1/2008
Authors: Xiaoyu X. Li, Thomas Scott, Christopher L Cromer, Joshua Aram Hadler
Abstract: For the past ten years, NIST has used high-reflectivity, optical choppers as beamsplitters and attenuators when calibrating the absolute responsivity and response linearity of detectors used with high-power CW lasers. The chopper-based technique has ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33004

39. Ultra-low-noise all-fiber photon pair source
Topic: Optoelectronics
Published: 8/21/2008
Authors: Shellee Dawn Dyer, Martin J Stevens, Burm Baek, Sae Woo Nam
Abstract: We demonstrate an all-fiber photon pair source with the highest coincidence-to-accidental ratio (CAR) reported to date in the fiber optic telecom C-band.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33011

40. Synchronization monitoring of I/Q data and pulse carving misalignment for a serial-type 80-Gb/s RZ-DQPSK transmitter through optical/RF clock tone measurement
Topic: Optoelectronics
Published: 8/4/2008
Authors: Jeffrey A Jargon, Xiaoxia Wu, Louis Christen, Scott Nuccio, Omer F. Yilmaz, Loukas Paraschis, Yannick K. Lize, Alan Willner
Abstract: We experimentally demonstrate a monitoring technique for determining misalignment between the in-phase/ quadrature (I/Q) data streams and between the data and pulse carving in an 80 Gb/s serial-type return-to-zero differential quadrature phase-shift- ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33136