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 15 of 15 for “"Relative Intensity Noise"”.
-
Signal modulation and relative intensity noise properties of transistor laser and nano-cavity VCSEL
… optical response as well as ultra-low laser relative intensity noise (RIN) reaching the “standard quantum limit”. In addition, the unique three-port electronical/optical (E/O) characteristics permit electrical “read-out” of optical parameters, which benefits for high speed direct …
-
Characterization and comparison of optical source relative intensity noise and effects in optical coherence tomography
… investigates the effects of optical source noise in optical coherence tomography (OCT). While shot noise, thermal noise and relative intensity noise (RIN) (excess photon noise) constitute optical noise, RIN is the least understood and often the most significant factor limiting the …
-
Investigation and development of a novel metrology standard for the measurement of relative intensity noise and frequency chirp of DFB lasers in optical networks
Laser diode Relative Intensity Noise (RIN) metrology capabilities have been developed and demonstrated, providing significantly improved sensitivity and accuracy than existing methods. This is a key parameter for laser components used in telecommunication systems due to the drive to reduce inherent …
-
Intensity stabilization of a solid-state laser for interferometric gravitational wave detectors
A high-power, low noise photo-detector, in conjunction with a current shunt actuator has been used in an AC-coupled servo to stabilize the intensity of a 10 Watt continuous-wave Nd:YAG laser. A relative intensity noise of 1 x 10⁻⁸ [square root] Hz at 10 Hz has been achieved.
-
Semiconductor Laser Device-Level Characteristics
… frequency responses for VCSEL and FP lasers, and relative intensity noise (RIN) for DFB and FP lasers have also been measured. Finally, the measurement of the frequency response of the optical pumping with 850nm VCSEL has been attempted.</p>
-
Enhanced digital modulation of coherently coupled vertical cavity laser arrays: theory and application
… Additionally, the differential resistance, relative intensity noise, and harmonic distortion are measured to characterize the behavior of coherently coupled laser arrays in the locking region. Two-dimensional maps of total relative intensity noise and total harmonic distortion are created to …
-
Output Characteristics and High-Speed Modulation of Composite -Resonator Vertical -Cavity Lasers
… including small-signal direct modulation and relative intensity noise measurements. The measured data in this chapter is compared to theoretical models, and several figures of merit for high-speed operation are calculated. The thesis concludes with an evaluation of the novelty of the CRVCL and …
-
High-Speed Modulation of Semiconductor Lasers and Modulators
… enhancement of the high-speed modulation and relative intensity noise (RIN) spectra of a side-mode injection-locked FP laser system. Second, we investigate integrated electroabsorption modulator-lasers. They are more compact and have very good high-speed performance. We study injection locking …
-
Development of a light force accelerometer
… photodetector. A simple model including laser relative intensity noise and shot noise from the measurement of the trapping beam powers estimates that the light force accelerometer could be capable of achieving a sensitivity of < 100 ng/Hz1/2. Essential components of this optical accelerometer, …
-
High-speed modulation of semiconductor lasers and properties of silver-coated quantum-dot lasers
… laser using electrical modulation and relative intensity noise (RIN) spectrum measurement are presented. Reasonable agreement is shown between the results from the two methods, and the pros and cons of each are described. Measured properties of newly fabricated silver-coated and …
-
Analysis and modeling of the effects of reflection induced noise on the performance of fiber optic communication systems
… to the interferometric conversion of laser phase noise into signal-dependent intensity noise. This relative intensity noise (RIN) is substantially higher than the intrinsic RIN of the laser. The power spectral density of the RIN and its impact on the performance of incoherent on-off keying digital …
-
The effects of noise in CATV distribution networks with star couplers and fiber amplifiers
Noise and distortion limit the channel capacity and degrade the system performance in AM-VSB SCM CATV Distribution Networks. The use of star couplers and fiber amplifiers is an approach to overcome these problems and meet the increasing demand for large capacity and high quality. The capacity and …
-
Practical performance and system capacity of lightwave AM SCM video systems
… limited system capacity due to large carrier-to-noise ratio (CNR) and low nonlinear distortion requirements. This research dissertation contains a comprehensive study of the system capacity of such systems based on theoretical analysis, experiment, and simulation. The practical performance of …
-
Phase Noise Characterization of a Mode-Locked Quantum-Dot Coherent Optical Frequency Comb Source Laser
… spectrum. This coherence implies that the phase noise exhibited by each comb line in the OFC is related which allows for effective methods of phase noise compensation. Consequently, OFCs are heavily under research and development. In this research, a prototype 25 GHz quantum-dot coherent optical …
-
Characterization of the Dynamics of Optically-Injected Nanostructure Lasers
… suppressing nonlinear distortion, and reducing relative intensity noise, mode-hopping, and chirp. The nonlinear dynamics associated with optically-injected semiconductor lasers has also attracted great interest due to potential applications including: all-optical amplitude-modulation to …