A new modulation scheme with a sensitivity of 2.3 photons per bit at a bit-error ratio (BER) of
10^− 3 is discussed theoretically and demonstrated experimentally. We achieve a limiting …

Stacking PS-QPSK and 64PPM for Long-Range Free-Space Transmission Page 1 NW2C.2.pdf
Advanced Photonics Congress © OSA 2013 Stacking PS-QPSK and 64PPM for Long-Range …

The sensitivity of the four-dimensional modulation format, polarization-switched quadrature
phase shift keying (PS-QPSK), is compared with polarization division multiplexed QPSK …

This article presents an efficient error-control code (ECC) and modulation for an optical
communications channel. The coded modulation is designed to support NASA's Mars Laser …

By exploiting the electromagnetic wave's four-dimensional signal space, we find that for the
additive white Gaussian noise channel, the modulation format with best sensitivity to be an 8 …

We introduce the multi-dimensional permutation-modulation format in coherent optical
communication systems and analyze its performance, focusing on the power efficiency and …

We have compared experimentally the transmission performance of on-off keying (OOK),
differential phase-shift keying (DPSK), and pulse position modulation (PPM) optical …

In this paper, we examine the performance of several modulation formats in more than four
dimensions for coherent optical communications systems. We compare two high …

We experimentally demonstrate biorthogonal modulation in 8 dimensions as binary pulse-
position modulation polarization-switched QPSK. We compare this format with PM-QPSK at …

We present a new class of optical modulation formats based on the combination of m-ary
pulse-position modulation (m-PPM) or m-ary frequency-shift keying (FSK) with additional …