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 7 of 7 for “"Heterodyne Interferometer"”.
-
An integrated heterodyne interferometer with on-chip detectors and modulators
… and sensors. Among complex optical systems, the interferometer represents perhaps the most important class of optical sensors and scientific instruments ever developed. Today, interferometric techniques are key to applications such as displacement measurement, photolithography, vibrometry, …
-
A combined phase contrast imaging and heterodyne interferometer system for multiscale fluctuation measurements on DIII-D
… combined diagnostic was constructed by adding a heterodyne interferometer to the pre-existing phase contrast imaging (PCI) system, both of which measure line-integrated electron-density fluctuations. The port-space footprint is minimized by using a single 10.6 pm CO2 laser and a single beampath. …
-
Ultra-Narrow Laser Linewidth Measurement
… the loss-compensated recirculating delayed self-heterodyne interferometer (LC-RDSHI) for ultra-narrow linewidth measurement, including the theoretical analysis, experimental implementation, further modification on the system and more applications. Recently, less than 1kHz linewidth fiber lasers …
-
Measurement of the local optical phase and amplitude in photonic devices using scanning near-field microscopy
… limit. Placing the SNOM into the arm of a heterodyne interferometer also enables the measurement of both the optical phase and amplitude in the near infrared. <br/><br/>In this work three different photonic devices are investigated. The optical field distribution within a fibre Bragg …
-
Optical measurement of neural action potentials using low coherence heterodyne interferometry
… low coherence interferometry. The dual beam heterodyne interferometer (DBHI) is a modified Michelson with a low coherence source and an optical referencing method capable of detecting sub-nanometer optical path changes. In this interferometer, acousto-optical modulators were used to produce …
-
LINEAR METHODS OF COMPUTER CONTROLLED OPTICAL FIGURING.
… reviewed. The machine uses a computer controlled heterodyne interferometer to provide optical testing data on the surface being polished. Two microcomputers are used to analyze the test data and run the machine. Optical figuring is performed by scanning a polishing head with a known removal …
-
Interferometry-based Free Space Communication And Information Processing
… algorithms. A number of techniques using heterodyne interferometry via acousto-optic device for optical path length measurements have been described. Finally, a whole new class of interferometric sensors for optical metrology and sensing applications is presented. A non-traditional …