Abstract

A number of data processing and data acquisition methods are presented that enhance the performance of a photodiode array (PDA) spectrometer. Zero-filling or Fourier-domain Interpolation is used to interpolate peak shapes. This improves the accuracy and precision of spectral peak height and position measurements and can be used to overcome spectral line/diode registry effects. A procedure is presented for the automated calibration and recalibration of the wavelength window measured with a photodiode array spectrometer. This method is based, in part, on cross-correlation of spectral patterns. Finally it is shown that by programming of the integration time, several spectra can be combined into a single wide-dynamic-range spectrum. Taken as a whole, these data processing and acquisition techniques improve the accuracy, precision, and dynamic range of spectrochemical data acquired with a PDA spectrometer. This is illustrated by using the system for the rapid measurement of excitation temperatures of plasma sources.

Photodiode array Fourier transform spectrometer with improved dynamic range

T. H. Barnes
Appl. Opt. 24(22) 3702-3706 (1985)

Temperature and nonlinearity corrections for a photodiode array spectrometer used in the field

Saber G. R. Salim, Nigel P. Fox, Evangelos Theocharous, Tong Sun, and Kenneth T. V. Grattan
Appl. Opt. 50(6) 866-875 (2011)

Fourier transform spectrometer with a self-scanning photodiode array

Takayuki Okamoto, Satoshi Kawata, and Shigeo Minami
Appl. Opt. 23(2) 269-273 (1984)

Improvement on lidar data processing for stratospheric aerosol measurements

Yoshikazu Iikura, Nobuo Sugimoto, Yasuhiro Sasano, and Hiroshi Shimzu
Appl. Opt. 26(24) 5299-5306 (1987)

Evaluation of a Hadamard-coded photodiode-array spectrometer under low illumination

Joseph L. Robichaud, Wallace K. Wong, and Roger A. Van Tassel
Appl. Opt. 33(1) 75-81 (1994)