1 January 1996 Directly modulated diode laser frequency doubled in a KTP waveguide as an excitation source for CO2 and O2 phase fluorometric sensors
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Abstract
A directly modulated infrared diode laser was frequency doubled in an intracavity KTP quasi-phase matched waveguide, producing modulated laser light at 425 nm, which was subsequently employed for phase fluorometric detection of CO2 and O2 gases. The frequency-doubled source was coupled to a single optical fiber to deliver the excitation light to the sensor mounted at the fiber tip. Fluorescence from the sensor returned through the same fiber to a photodetector. This compact, low-power source provided continuously tunable modulation frequencies up to 200 MHz. In the detection of CO2 , the doubled infrared diode laser produced 425-nm light that was modulated to a depth of 27% at a modulation frequency of 95 MHz.
Raja Holavanahali, Raja Holavanahali, Romauld M., Romauld M., Gary M. Carter, Gary M. Carter, Govind Rao, Govind Rao, Jeffrey Sipior, Jeffrey Sipior, Joseph R. Lakowicz, Joseph R. Lakowicz, John D. Bierlein, John D. Bierlein, } "Directly modulated diode laser frequency doubled in a KTP waveguide as an excitation source for CO2 and O2 phase fluorometric sensors," Journal of Biomedical Optics 1(1), (1 January 1996). https://doi.org/10.1117/12.227105 . Submission:
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