The optical spectrum measurement is indispensable to the wavelength division multiplexing (WDM) technology that is increasingly being used in optical communications. Optical spectrum analyzers, which measure and analyze the optical spectrum of light that travels through optical fibers, are required to have high performance, functionality, and throughput as sophisticated optical communication de...

A novel radio frequency sensor technology is presented for continuous monitoring of the radio frequency spectrum with large instantaneous bandwidth that can perform spectral analysis and direction finding simultaneously. The photonic receiver technology relies on a spatial spectral (S2) holographic crystal recording device that is an extreme bandwidth analyzer and correlator (EBAC). The S2 EBAC...

This paper presents an analog built-in testing (BIT) architecture and its implementation. It enables the frequency response and harmonic distortion characterizations of an integrated device-under-test (DUT) through a digital off-chip interface. External analog instrumentation is avoided, reducing test time and cost. The proposed on-chip testing scheme uses a digital frequency synthesizer and a ...

Interactions between atoms and lasers provide the potential for unprecedented control of quantum states. Fulfilling this potential requires detailed knowledge of frequency noise in optical oscillators with state-of-the-art stability. We demonstrate a technique that precisely measures the noise spectrum of an ultrastable laser using optical lattice-trapped 87Sr atoms as a quantum projection nois...

Problem Statement. Everyone will agree that a key issue in the design of multi-GHz interface devices is jitter performance. To characterize jitter performance, do you measure timing jitter or period jitter of the device? Should the Bit Error Rate performance of the device also be tested? Is there any way to shorten the overall test time? And as always, is there a way to reduce the test cost? Fu...

A novel approach to monitoring the laser injection-locking (IL) state is proposed and verified using side-mode suppression ratio (SMSR). In a photonics experiment for IL, an optical spectrum analyzer with conventional criterion of 35-dB SMSR conventionally used detect locking Fabry–Pérot (FP) multiple longitudinal modes external master one mode. Since not always sufficient condition, we propose...

This work presents the implementation of FPGA based run time reconfigurable audio player system that is targeted to ML507 board with frequency component display of the stored audio data. The presented work combines both HW and SW flows where the complex parts of the architecture are designed to HW modules. These HW modules can be reconfigured on the fly by using partial dynamic reconfiguration....