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Open-source photoluminescence system

3,636 bytes added, 06:20, 20 February 2012
=== Papers/Documents ===
====[ A Low Cost Compact CCD Grating Spectrometer]<ref> K. F. Lin and G. Schaefer, “A low cost compact CCD grating spectrometer,” in , Conference Record of the 1993 IEEE Industry Applications Society Annual Meeting, 1993, 1993, pp. 2334–2337 vol.3.<br /ref>====''Abstract''<br />The authors describe a grating spectrometer consisting of a slit, a transmission holographic grating, a lens, and a CCD (charge coupled device) camera. A frame grabber equipped in a computer digitizes the NTSC signal from the CCD camera. The system is relatively small (12.7 cm×17.8 cm×30.5 cm) and light-weight (5.4 kg). The system will measure the output of modern fluorescent or compact fluorescent lamps more accurately than conventional filter-based photometers. ====[ Tolerance design of optical micro-bench by statistical design of experiment]<br ref>B. C. Hwang, H. Y. Park, J. Y. Lee, S. G. Park, S. G. Lee, B. H. O, D. S. Choi, and E. H. Lee, “Tolerance design of optical micro-bench by statistical design of experiment,” in CLEO/>Pacific Rim 2003 - The 5th Pacific Rim Conference on Lasers and Electro-Optics, 2003, vol. 2.<br /ref>====''Abstract''<br />Design rule of optical micro-bench and tolerance of positional error of components assembled onto the bench are investigated in case of simple linear connections of incoming and outgoing optical fibers with and without ball lenses. Since there are many error variables with wide range of values that affects the optical coupling, the efficient array with reduced number of combinations is generated using statistical design of experiment and coupling efficiencies are calculated. From 3d B point, the tolerance of each position error is determined. For the fiber-to-fiber connection with ball lenses, the longitudinal and lateral positional errors have the strong interaction with each other to the coupling efficiency and thus should be be limited simultaneously. ====[ Laser photoluminescence spectrometer based on charge-coupled device detection]<br /ref>O. H. Y. Zalloum, M. Flynn, T. Roschuk, J. Wojcik, E. Irving, and P. Mascher, “Laser photoluminescence spectrometer based on charge-coupled device detection for silicon-based photonics,” Review of Scientific Instruments, vol. 77, no. 2, p. 023907–023907–8, Feb. 2006.<br /ref>====''Abstract''<br />We describe and characterize a multichannel modular room temperature photoluminescence spectroscopy system. This low cost instrument offers minimization of size and complexity as well as good flexibility and acceptable spectral resolution. The system employs an efficient flexible front end optics and a sensitive spectrometer with a charge-coupled device array detector. The spectrometer has no moving parts and is more robust than a scanning system. The scientific motivation was to enable the photoluminescence study of various silicon photonics structures. Typical applications are presented for SiOx (x<2) films. It is demonstrated that high-quality steady state photoluminescence data with excellent signal to noise enhancement capability can be delivered besides the ability to perform simultaneous multiwavelength measurements in one shot. This instrument is shown to be useful for evaluating semiconductor wafers, including those intended for light emitting structures from silicon-based photonic crystals. The design, construction, calibration, and the unique features of this system are presented, and performance tests of a prototype are discussed. ==== XX ====
=== Patents/IP ===


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