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 11 of 11 for “"Optical sampling"”.
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High-Speed Optical Sampling Techniques Enabled By Ultrafast Semiconductor Lasers
In this thesis, novel optical sampling techniques are theorised and demonstrated using quantum dot two-section passively mode-locked laser diodes (MLLDs) as an inexpensive and compact source of ultrashort light pulses on the order of a few picoseconds duration.<br/><br/>The first technique, OSBERT …
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Operating regimes of injection-locked quantum-dot lasers and applications in high-speed optical sampling
Abstract currently unavailable. Restricted access until 31.08.2024. Please refer to PDF.
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System demonstration of an optically-sampled, wavelength-demultiplexed photonic analog-to-digital converter
… analog-to-digital converters (ADCs) at high sampling rates is fundamentally limited by the timing jitter of electronic clocks. To circumvent this limitation, one method is to exploit the orders-of-magnitude lower timing jitter of mode-locked lasers and implement optical sampling as a …
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High repetition rate fiber lasers
… lasers. Driven by the applications including optical arbitrary waveform generation, high speed optical sampling, frequency metrology, and timing and frequency distribution via fiber links, low noise fiber laser sources operating at multi-gigahertz repetition rates are developed systematically. …
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All-semiconductor High Power Mode-locked Laser System
All-optical synchronization and its application in advanced optical communications have been investigated in this dissertation. Dynamics of all-optical timing synchronization (clock recovery) using multi-section gain-coupled distributed-feedback (MS-GC DFB) lasers are discussed. A record speed of …
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Integrated high-repetition-rate femtosecond lasers at 1.55 [mu]m
… limited by the 100-fs aperture jitter. However, optical sampling can overcome the jitter limit by using femtosecond lasers that have jitter as low as 100 as, which is a three orders of magnitude improvement when compared to electronics. Currently, most of these lasers exist as bulk or fiber …
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Fully Integrated CMOS-compatible mode-locked lasers
… integrated photonics has already revolutionized optical communications and is making rapid advances in signal processing, light detection and ranging, optical sensing, bio-medical diagnostics and imaging, and military-related applications. Large and complex radio-frequency and optical systems …
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Optical pulse distortion and manipulation through polarization effects and chromatic dispersion
… shaping mechanisms play a significant role in optical fiber communication and sensing. In this thesis we shall investigate techniques which alleviate pulse deterioration due to polarization effects, and utilize large chromatic dispersion for system performance enhancement. We first demonstrate …
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Processing of ultra-short optical pulses for high bit-rate optical communications
… linear pulse shapers into various all-optical signal processing devices for applications in high speed optical communication systems, to enhance the overall system performance, is investigated. The linear pulse shaping is performed using superstructured fibre Bragg gratings, which seem …
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3 GHz Yb-fiber laser based femtosecond sources and frequency comb
… pulses in a fixed time period. For nonlinear bio-optical imaging in which photo-induced damage is caused by pulse energy rather than average power, increasing pulse repetition-rate will improve signal-to-noise ratio and reduce data acquisition time. In the frequency domain, a higher repetition …
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Ankunftszeitbestimmung ultrakurzer XUV Pulse von FLASH durch Kreuzkorrelation mit ultrakurzen NIR Pulsen
… of both pulses. An energy-dispersive electron optical system can image the cross-correlation volume and separate the energetically modulated from the unmodulated photoelectrons. From the spatial position of the cross-correlation signal the relative timing of both pulses can be deduced. In the …