Virtualk-Space Modulation Optical Microscopy
نویسندگان
چکیده
منابع مشابه
High-speed focal modulation microscopy using acousto-optical modulators
Focal Modulation Microscopy (FMM) is a single-photon excitation fluorescence microscopy technique which effectively rejects the out-of-focus fluorescence background that arises when imaging deep inside biological tissues. Here, we report on the implementation of FMM in which laser intensity modulation at the focal plane is achieved using acousto-optic modulators (AOM). The modulation speed is g...
متن کاملImplementation of a Coded Modulation for Deep Space Optical Communications
Abstract— We present an efficient implementation of a coded modulation for the deep space optical channel. NASA designed this so called serially concatenated pulse position modulation (SCPPM) code to provide an optical link that can operate within one dB signal energy of the Shannon capacity during a nominal mission condition from Mars. Here, we describe some of the challenges in realizing the ...
متن کاملDifferential Multi-Pulse Position Modulation for Free Space Optical Communication
In order to improve the laser output power in free space optical communication, it is necessary to improve the power efficiency of laser modulation as much as possible, in the case of the limitation of the laser. In this paper, based on the theory of pulse position modulation (PPM), a differential multi-pulse position modulation(DMPPM) scheme was designed, by consulting the structure characteri...
متن کاملDeep-Space Optical Communications Downlink Budget: Modulation and Coding
A link budget for a deep-space optical channel depends in part on the choice of modulation format and error-control coding scheme. This article describes several properties of the channel capacity that lead to an appropriate selection of modulation format, pulse-position modulation (PPM) order, and error-control code rate. It also describes performance limits when additional constraints—such as...
متن کاملDesign of a Coded Modulation for Deep Space Optical Communications
We show how to design a modulation and error correcting code (ECC) to achieve near-capacity performance on a deep space optical link. We begin by comparing the capacity of various modulations, given the power and bandwidth constraints of the channel and show that pulse position modulation (PPM) is near-optimal for a nominal mission scenario to Mars. We present a coded PPM solution comprised of ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2016
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.117.028102