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.
Results
Showing 1 to 20 of 46 for “"Mode-Locked Laser"”.
-
All-semiconductor High Power Mode-locked Laser System
… gain-coupled distributed-feedback (MS-GC DFB) lasers are discussed. A record speed of 180-GHz timing synchronization has been demonstrated using this device. An all-optical carrier synchronization (phase and polarization recovery) scheme from PSK (phase shift keying) data is proposed and …
-
Semiconductor Mode-Locked Laser for High-Speed OTDM Transmission
Das Ziel dieser Arbeit ist die Untersuchung von modengekoppelten Halbleiterlasern für die Anwendung als Sender Pulsquelle in einem optischen Zeitmultiplex (OTDM) System mit Datenraten von bis zu 640 Gbit/s mit Amplitudenmodulation (OOK) oder differentieller Phasenmodulation (DPSK). Bis zu dieser …
-
External Cavity Multiwavelength Semiconductor Mode-locked Laser Gain Dynamics
External cavity semiconductor mode-locked lasers can produce pulses of a few picoseconds. The pulses from these lasers are inherently chirped with a predominant linear chirp component that can be compensated resulting in sub-picosecond pulses. External cavity semiconductor mode-locked lasers can be …
-
The Application of a Mode-Locked Laser to Holography
Made available in DSpace on 2014-12-10T19:06:46Z (GMT). No. of bitstreams: 1 7206969.pdf: 3191817 bytes, checksum: ddf4f23f49d300bf7283b4d57789025e (MD5) Previous issue date: 1971
-
The effect of gain saturation on actively mode-locked laser pulses
… occurs within pulse duration for actively node-locked lasers and to discuss its effects on the generated pulses. The population inversion, obtained analytically using a perturbation scheme, has been found to vary considerably within pulse envelope. An assumingly Gaussian pulse has been followed …
-
Mode-locked laser diodes for the 750 – 770 nm spectral region
Ultrashort pulse lasers are widely used in research, industry, medicine, and communications, because of their characteristics of narrow pulse width, high repetition frequency, broad spectrum and high peak power. They are influencing and changing our world. Mode-locking is an effective way to …
-
Hybrid Silicon Mode-Locked Laser with Improved RF Power by Impedance Matching
<p>The mode-locked laser diode (MLLD) finds a lot of use in applications such as ultra high-speed data processing and sampling, large-capacity optical fiber communications based on optical time-division multiplexing (OTDM) systems. Integrating mode-locked lasers on silicon makes way for highly …
-
Novel Approaches to Power Scaling In Mode-Locked Laser Diode Based Ultrashort Pulse Sources
… to upscaling the average output power of mode-locked laser diode ultrashort pulse sources were investigated. This was done with the motivation of developing mode-locked laser diode based light sources for nonlinear bioimaging applications to which high repetition rate pulse sources such as …
-
A Compact RF/Photonic Antenna using a Quantum Dot Mode Locked Laser as a Source
… antenna design integrated with a quantum dot mode-locked laser (QDMLL). A two-section QDMLL is used to produce pulsed microwaves signals to feed the radiating antenna. To realize the microwave signal radiation generated by the QDMLL, several possible MLL-integrated-antennas are proposed. The …
-
Double-interval technique for higher order harmonic generation of a quantum dot mode-locked laser
… todays technology. In this thesis a quantum dot mode-locked laser is passively locked and using the double-interval technique achieves higher order harmonics. The double-interval technique is commonly used with musicians to create false harmonics while they strum their instruments. When a …
-
Photonic generation of microwave signals : a quantum dot mode locked laser as a microwave source
… generated inside a quantum dot, passively mode locked laser. In order for this laser to be used as a microwave source, a microwave interface was created and connected to the laser. To characterize the source, its output microwave impedance was measured by using the load-pull technique. …
-
True linearized intensity modulation for photonic analog to digital conversion using an injection-locked mode-locked laser
… thesis. This has been achieved by introducing a mode-locked laser into one of the arms of a Mach-Zehnder interferometer and injection-locking it to the input light (which is pulsed and periodic). By modulating the injection-locked laser, and combining its output light with the light from the …
-
Silicon-germanium saturable absorbers and erbium-doped waveguides for integrated mode-locked lasers
… as crucial components for integration of a mode-locked laser on a Si-chip. The SiGe-SBR is designed to be compatible with Si-based fabrication processes for monolithic integration and to need as little saturation fluence as possible so that it can be used for higher repetition rate lasers …
-
An optical-electrical sub-sampling down-conversion receiver with continuous-time [Sigma] [Delta] modulation
… optical domain is achieved by using a low-jitter mode-locked-laser and a high-bandwidth interferometer. The sub-sampled information is then digitized by an optical-electrical continuous-time (CT) [Sigma] [Delta] analog- to-digital converter (ADC). Here, photodiodes and low-jitter pulses from the …
-
A preconditioned Newton-Krylov method for computing steady-state pulse solutions of mode-locked lasers
… solve the periodic boundary value problem for a mode-locked laser cavity using a specially preconditioned matrix-implicit Newton-Krylov solver. Solutions are obtained at least an order of magnitude faster than with dynamic simulation, the standard method. Our method is demonstrated experimentally …
-
Simulation, Fabrication, and Characterization of Semiconductor Lasers
Semiconductor lasers are very important in today’s world, considering their applications in communication, medical, spectroscopy and also in our daily lives.This thesis discusses three different types of laser: broad area, ridge waveguide and mode locking laser. Broad area laser (BAL) is the …
-
Fully Integrated CMOS-compatible mode-locked lasers
… components. An on-chip high repetition-rate mode-locked laser is a key enabler of many integrated photonics applications, such as all-optical sampling, on-chip frequency combs, low phase noise microwave oscillators, photonic ADCs and others. First-ever fully-integrated on-chip mode-locked …
-
Nonlinear optical frequency conversion of mode-locked all-solid-state lasers
… of robust diode-pumped solid-state mode-locked lasers as a platform for nonlinear optical frequency conversion experiments. One objective is to create an ultrashort-pulsed source that is tunable between λ= 600nm and λ= 700nm, since currently no other laser gain media exists that …
-
Investigation of intracavity phase interferometry applied to nano-metrology
… to be measured is put as integral part of a mode-locked laser. It relies on the fact that any intracavity phase shift of an intracavity pulse will result in a frequency change of the whole pulse train. The implementations of IPI requires the operation of a mode-locked laser in which two …
Page 1 of 3