Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Frequency Chirp"”.
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Investigation and development of a novel metrology standard for the measurement of relative intensity noise and frequency chirp of DFB lasers in optical networks
… noise figure of 2 to 3dB over the 10MHz to 20GHz frequency range (-171dBm to -172dBm), some 4 to 5dB better than previously reported. Good agreement has been shown comparing thermal noise subtraction and 3dB rise techniques confirming the theoretical dominance of the rf amplifiers noise figure. …
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High harmonic generation by short laser pulses: time-frequency behavior and applications to attophysics
… gas atoms excited by an intense laser field at frequency ω<sub>1</sub> emit radiation of higher frequencies that are odd integer multiples of ω<sub>1</sub>. Driven by an infrared laser, high harmonic radiation can span from the optical into the extreme ultraviolet (XUV) frequency range. In this …
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All-optical signal processing using cascaded quadratic interactions in periodically poled lithium niobate waveguides
… second harmonic generation and difference frequency generation (cSHG/DFG) and cascaded sum frequency generation and difference frequency generation (cSFG/DFG), are demonstrated. These two processes are conventionally employed for wavelength conversion in the telecommunication band. To …
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Femtosecond optical parametric oscillators for the mid-infrared
… were sub-100 fs, and essentially free from frequency chirp. With appropriate dispersion compensation the near-infrared signal pulses were temporally compressed to 69 fs. Theoretical models of noncollinear phasematching were derived and the results agreed closely with experiment. A novel …
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Diode Laser Spectroscopy for Measurements of Gas Parameters in Harsh Environments
… distributed monitoring of gases. Emission frequency chirp exhibited by semiconductor diode lasers operating in pulsed current mode, is exploited to capture full absorption response spectrum from a target gas. This new technique is referred to as frequency chirped diode laser spectroscopy …