Generation of Power-Efficient FCC-Compliant UWB Waveforms Using FBGs: Analysis and Experiment

Gbps impulse radio (IR) ultra-wideband (UWB) transmission over 100 meters multi mode fiber with 4 meters wireless transmission

“…The first category includes [4], [5] and [6] where fiber Bragg gratings have been used to control the delay between the two pulses, [7] where modules with differential group delay have been used, [8] where a dispersive medium provided the delay between the pulses. UWB pulse generation by nonlinear processing has been demonstrated using a microwave differentiator [9], using nonlinear pulse shaping of fiber Bragg gratings [10], and using nonlinear modulation of electroopic modulators [11], [12]. Additionally, in [13] UWB generation using a directly modulated laser together with chirp to intensity modulation was demonstrated, in [14] the carrier dynamics of an uncooled distributed feedback laser was used to generate the UWB signal, a demonstration of optical generation and transmission with included wireless transmission is presented in [15], a multi-hub system employing polymer fiber is demonstrated in [16], and an analysis of UWB transmission in FTTH networks is presented in [17].…”

A photonic ultra-wideband pulse generator based on relaxation oscillations of a semiconductor laser

“…The first derivative of a Gaussian pulse is referred to as a monocycle, and the second derivative is known as a doublet. Recently, many methods have been proposed to generate UWB signals in the optical domain [4][5][6][7][8][9][10][11][12][13][14][15]. Typically, these methods can be divided into two broad classes: time delay and nonlinear signal processing.…”

“…The second method is based on the nonlinear processing capability of some electrical or photonic components, after which the derivative of the Gaussian pulse is achieved. For example, a microwave differentiator [11], nonlinear pulse shaping of FBG [12] and nonlinear modulation of electro-optical modulators [13,14] have been proposed. Meanwhile, a photonic UWB generator based on direct current modulation of a laser and chirp-to-intensity conversion has also been experimentally demonstrated [15].…”

“…Most of these efforts focus on the generation of monocycle or doublet pulses. Moreover, the studies in [12,16] show the monocycle and monocycle based Gaussian pulses hardly follow the FCC requirements, and that one way to overcome this limitation is to generate higher-order (up to fifth-order) derivatives of the Gaussian pulse with complex shape.…”

Photonic Ultra-Wideband 781.25-Mb/s Signal Generation and Transmission Incorporating Digital Signal Processing Detection

“…The second category exploits the nonlinear processing capabilities of some electrical and photonic components, after which the derivative of a Gaussian pulse is achieved. For example, use of a microwave differentiator [8], nonlinear pulse shaping of FBG [9], and nonlinear modulation of electrooptical modulators [10], [11] have been proposed. In addition, a photonic UWB generator based on the direct current modulation of a laser and chirp-to-intensity conversion has also been experimentally demonstrated [12].…”