| 摘要 |
<p>A spectroscopy system that may be used for spectrophotometric oxygenation monitoring of tissue includes a monitor portion and a sensor portion. The sensor portion generally includes a light source and one or more light detectors. The sensor portion may attach to a human to sense light signals from the light source that have traversed biological tissue, the light signals ultimately being used by the system to determine biological tissue blood hemoglobin oxygenation levels. The monitor portion generally includes a processor and a visual display. A laser beam combiner may couple a plurality of laser diode output light signals into one optical fiber. To stabilize the output of each of the laser diodes, an optical fiber light stabilizer is coupled to the combined laser diode output. The optical fiber light stabilizer redistributes the modes in the optical fiber such that the higher-order modes are filled until an equilibrium mode distribution is established. A light sensor may also provide feedback with respect to the laser diode output, which allows for compensation of any laser diode light output instability independently of optical fiber related instabilities.</p> |
