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Difference between revisions of "Open-source photoluminescence system"

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=== Papers/Documents ===
 
=== Papers/Documents ===
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====[http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=299204 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.</ref>====
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''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.
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====[http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1277106 Tolerance design of optical micro-bench by statistical design of experiment]<ref>
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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.
 +
</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.
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====[http://rsi.aip.org/resource/1/rsinak/v77/i2/p023907_s1?isAuthorized=no Laser photoluminescence spectrometer based on charge-coupled device detection]<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.
 +
</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.
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=== Patents/IP ===
 
=== Patents/IP ===

Revision as of 06:20, 20 February 2012


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Introduction

  • basic theory - heavily referenced (focus primarily on ingan PL) after initial theory of concept

Design

  • equipment list and specs for our ocean optics system
  • Design schematic
  • pictures of setup
  • operation instructions
this section will eventually get ported to its own protocol page.

Open source PL Design

  • equipment list and specs
  • 3D design schematic - particularly of external case to be printed by reprap
  • pictures of setup
  • operation instructions

See also

Literature Review

This section is currently being updated...

Papers/Documents

A Low Cost Compact CCD Grating Spectrometer[1]

Abstract
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[2]

Abstract
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[3]

Abstract
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

Compact Imaging Spectrometer - #6,744,505[4]

Abstract
The subject invention relates to the design of a compact imaging spectrometer for use in thin film measurement and general spectroscopic applications. The spectrometer includes only two elements, a rotationally symmetric aspheric reflector and a plane grating. When employed in a pupil centric geometry the spectrometer has no coma or image distortion. Both spherical aberration and astigmatism can be independently corrected. The invention is broadly applicable to the field of optical metrology, particularly optical metrology tools for performing measurements of patterned thin films on semiconductor integrated circuits

Apparatus for Photoluminescence Microscopy and Spectroscopy - #6,429,968 [5]

Abstract
In accordance with the teachings of the present invention, it has been discovered that an optical analysis that is uniquely based on geometrical rather than diffraction considerations, for the purposes of controlling the size of the region from which the photoluminescence is collected, provides an optical system capable of performing photoluminescence microscopy and/or spectroscopy without the disadvantages of the prior art. It is based, in part, on the use of an optical fiber(s) as a field stop within the detection arm(s) of the optical system for coupling the photoluminescence into an optical spectrum analyzer (OSA) and/or photodetector, wherein the diameter and the numerical aperture of the optical fiber are judiciously chosen to limit the field of view, or the region from which the photoluminescence is collected.

Fiber-optics based Micro-photoluminescence System - #6,075,592[6]

Abstract
Spatially resolved photoluminescence (PL) apparatus is used for the non-destructive characterization of a semiconductor sample. PL excitation from a diode laser is transmitted through a dichroic coupler and, in turn, over a fiber to a fiber collimator wherein the laser light is collimated into a pump beam prior to entering an air path. The air path is composed primarily of an objective lens. The objective lens focuses the pump beam on the sample surface. The photoluminescence signal emitted by the sample travels the same path but in the opposite direction as the pump beam and is collected by the same fiber as a reflected signal. The dichroic fiber coupler is used to separate the return signal from the pump beam with a low insertion loss for each beam. The return PL signal is fed to an optical spectrum analyzer using a single mode fiber connected to the coupler. The sample is placed on a rotational stage capable of x, y and z movement under computer control.

Fiber Optic Photoluminescence Sensor - #5,141,312[7]

Abstract
A photoluminescence sensor for detecting a photoluminescent light from a toluminescent material is disclosed. In a preferred embodiment the photoluminescence sensor comprises: a source of light; a concave mirror having at least one perforation for passing the source light through the at least one perforation; an optical waveguide having proximal and distal ends with the photoluminescent material being disposed at the distal end; an objective for directing the source light into the proximal end of the waveguide; an objective for receiving photoluminescent light and for focusing the photoluminescent light onto the perforated concave mirror; a liquid filter for passing the photoluminescent light reflected from the perforated concave mirror to a detector to detect the photoluminescent light. The sensor can also include a chopper disposed at the output end of the objective for modulating the light source at a select frequency and a lock-in amplifier tuned to measure the output from the detector at the select frequency.  

References

  1. 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.
  2. 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.
  3. 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.
  4. D. Y. Wang and D. M. Aikens, “United States Patent: 6744505 - Compact imaging spectrometer,” U.S. Patent 674450501-Jun-2004.
  5. G. E. Carver, “United States Patent: 6429968 - Apparatus for photoluminescence microscopy and spectroscopy,” U.S. Patent 642996806-Aug-2002.
  6. S. Banerjee and C. Zah, “United States Patent: 6075592 - Fiber-optics based micro-photoluminescence system,” U.S. Patent 607559213-Jun-2000.
  7. R. B. Thompson and M. Levine, “United States Patent: 5141312 - Fiber optic photoluminescence sensor,” U.S. Patent 514131225-Aug-1992.