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Single-longitudinal-mode, narrow-linewidth laser has many applications such as coherent optical communication and long distance optical sensing. One traditional way to generate this laser is using long fiber (e.g. several kilometers or even above) cavity combing stimulated Brillouin scattering (SBS) effect [1]. But this structure exists some intrinsic problems such as being sensitive to environment...
We propose an integrated transmitter for deep space communications consisting of an indium phosphide photonic integrated circuit (PIC) frontend followed by an average-power-limited amplifier. The frontend PIC achieves a 28-dB extinction ratio for 16-ary pulse position modulation.
We proposed and validated experimentally four advanced principles for circuit optimization of long-term fiber-optic analog RF memory: distributed structure of low-power emitters based on dense wavelength division multiplexing, multicore optical fiber as retarding medium, two-stage processing including optoelectronic repeater unit, and optical recirculation time-delay circuit.
A novel technique to create a lossless tunable RF-photonic filter with ultra-high suppression is experimentally demonstrated. Through precise amplitude and phase tailoring, the filter achieved minimum insertion loss (0dB) and maximum isolation (> 50dB) simultaneously with wide tuning of frequency (0–12GHz) and bandwidth (100–220MHz).
The purpose of this presentation is to discuss photonics technologies' role in enabling electronic warfare (EW) capabilities. Photonics technologies are primed to be a disruptive technology, and are ripe for an S-curve jump in the near-term. Closely monitoring emerging technologies in this domain will provide those with the core-competency to effectuate a strategic technological advantage over their...
High-power high linearity photodetectors are desirable for applications that require high spurious free dynamic range (SFDR), such as a receive mode antenna employing a photonic link. Both the output third order (OIP3) and output second order intercept point (OIP2) of the photodetector can cause a reduction in SFDR, where OIP3 is of concern for distortion close to the fundamentals [1] and OIP2 for...
Inspired by mechanical gearboxes, we introduce an optical analog implementation of the gearbox as a means to overcome the mismatch between the ultrahigh speed of optical data and the much slower sampling rate of electronic digitizers and processors.
We demonstrate a dynamic fiber Bragg grating (FBG) strain sensor interrogation using a 1550 nm band resonance Fourier domain mode-locked fiber laser. We successfully achieved a real-time measurement of the abrupt change of the applied frequencies to the FBG without any signal processing delay.
Sandia National Laboratories has developed a toolkit of RF photonic devices. These devices have been used in the development of multielement RF photonic circuits and in support of MPW runs. In this talk I will discuss Sandia's silicon photonic process and RF photonic device performance.
We demonstrate compact silicon photonic arrayed waveguide gratings with channel spacing down to 1 GHz using active phase correction. The relative phase of each path within the device is directly measured using an interferometer, and two methods of phase optimization are implemented and compared.
This talk will focus on recent work done at Sandia National Laboratories in compound semiconductor integrated photonics relevant to avionics. Two technologies will be presented: Sandia's InP-based photonic integrated circuit platform which enables highly functional circuits and advanced heterogenous integration for microscale photovoltaic systems.
Recently, thanks to the innovation in optical and electro-optical components, space based passive radiometers and microwave sensors can be efficiently supported by complementary light detection and ranging (Lidar) systems. One of the most important applications for astronautics Lidars, is the measure of target's distance and its relative properties as, topography, surface's roughness and reflectivity,...
Photonic systems are being deployed today using advances in fiber communications and the convergence of optical-wireless. This talk explores extending this convergence to our military's communications & sensor systems through the development of photonic-based coherent frequency converting technologies operating throughout the RF and millimeter wave spectrum.
In this paper· the study of aircrafts equipped with optical systems and networks is presented. In this regard· we present our optical rotary sensor for fly-by-light flight control systems in which the angular displacement (Operating range: 180°) is encoded in the measured optical power.
Traditional military aircraft design used fiber optics only for specific applications; copper-based legacy buses are still the preferred options due to their proven reliability. However, new platforms are adopting fiber optics for general purpose systems, like the mission high speed data network of the F-35 based on FibreChannel [1] and fuel and audio systems for the A400M [2]. But most of applications...
Future terabit optical communication systems will rely on higher order Quadrature Amplitude Modulation (QAM) formats to improve the spectral efficiency (SE). However, these formats exhibit a higher sensitivity to linear as well as non-linear impairments throughout the optical link [1, 2]. These impairments may be time-varying in nature arising from mechanical disturbance in optical fibers, temperature...
The term aerospace qualification may be misleading as qualification testing is applicable to virtually all components and systems in various applications and markets. Aerospace applications, both commercial and military, are only unique in their rather harsh conditions given the installation environment and the potentially lethal consequences of either component or system malfunction or failure.
The aerospace industry nominally follows the commercial photonics industry in adapting devices and practices to perform in rugged environments that include aggressive ranges of temperature, humidity, altitude, shock, and vibration. Airborne platforms place particular emphasis on size, weight, and power. Optical communications in aerospace platforms requires an infrastructure that supports stable and...
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