Spectroscopy-01-01-2006

Spectroscopy

Efficient Raman Lasing in Tapered Silicon Waveguides

January 01, 2006

Articles

21

1

The authors review the operating principles of a silicon Raman laser and show that by introducing a longitudinal variation of the waveguide width in the cavity, the lasing efficiency can be increased significantly.

Linearity in Calibration: Quantifying Nonlinearity, Part II

January 01, 2006

Chemometrics in Spectroscopy

21

1

At this point in our series dealing with linearity, we have determined that the data under investigation do indeed show a statistically significant amount of nonlinearity, and we have developed a way of characterizing that nonlinearity. Our task now is to come up with a way to quantify the amount of nonlinearity, independent of the scale of either variable, and even independent of the data itself.

Linearity Jan 06

January 01, 2006

21

1

Efficient Raman Jan 06

January 01, 2006

21

1

Mars Express Finds Evidence of Liquid Water on Mars

January 01, 2006

Articles

21

1

Since the discovery of gullies on Mars in 2000, NASA has endeavored to re-image areas known to have them. Now for the first time, using before and after images taken of the same region on Mars, a dune gully flow is shown to have happened very recently.

Chemometrics in Spectroscopy ? Linearity in Calibration: Quantifying Nonlinearity, Part II (PDF)

January 01, 2006

21

1

At this point in our series dealing with linearity, we have determined that the data under investigation do indeed show a statistically significant amount of nonlinearity, and we have developed a way of characterizing that nonlinearity. Our task now is to come up with a way to quantify the amount of nonlinearity, independent of the scale of either variable, and even independent of the data itself.

Modulators

January 01, 2006

The Baseline

21

1

Some types of spectroscopy work better if the intensity of the light source increases and decreases in a regular pattern. Such a varying signal is called modulated, and here, the author explores the devices that perform this function.

Efficient Raman Lasing in Tapered Silicon Waveguides (PDF)

January 01, 2006

Articles

21

1

The authors review the operating principles of a silicon Raman laser and show that by introducing a longitudinal variation of the waveguide width in the cavity, the lasing efficiency can be increased significantly.