# Journal of Lightwave Technology

## Filter Results

Displaying Results 1 - 25 of 30
• ### A Silicon Aperiodically Distributed Traveling-Wave Photodetector With Enhanced RF Output Power

Publication Year: 2018, Page(s):3152 - 3161
| | PDF (885 KB)

We propose an aperiodic loading technique to enhance the RF output power of a silicon distributed traveling-wave photodetector (TWPD), which can be used to handle high optical powers in analog optical links. This technique contains a traveling wave electrode whose input terminal is open circuit so as to avoid shunting any photocurrent from the photodetector (PD) array. As a result, the RF output t... View full abstract»

• ### Enhanced Performance Utilizing Joint Processing Algorithm for CAP Signals

Publication Year: 2018, Page(s):3169 - 3175
| | PDF (1111 KB)

In this paper, we propose a joint processing algorithm for carrierless amplitude and phase modulation (CAP) signal to improve the system performance in both short-reach and metro network. Utilizing our proposed method, 112 Gb/s/λ CAP-64 quadrature amplitude modulation (QAM)-based transmission over 50 km of standard single mode fiber (SSMF) is experimentally achieved with a ban... View full abstract»

• ### 10 Tb/s PM-64QAM Self-Homodyne Comb-Based Superchannel Transmission With 4% Shared Pilot Tone Overhead

Publication Year: 2018, Page(s):3176 - 3184
| | PDF (766 KB)

We demonstrate transmission of a comb-based 10 Tb/s 50 $times$ 20 Gbaud PM-64QAM superchannel using frequency comb regeneration to reduce carrier offsets and allow for self-homodyne detection. The regeneration is enabled by transmitting two optical pilot tones which are filtered and recovered in the receiver usin... View full abstract»

• ### The Vertical-Cavity Surface-Emitting Laser as a Sensing Device

Publication Year: 2018, Page(s):3185 - 3192
| | PDF (871 KB)

We show that a change to the quality (Q) factor of a laser diode cavity affects the electrical properties of the device. The mechanism is demonstrated experimentally and numerically via a 980-nm InGaAs/GaAs oxide-aperture vertical-cavity surface-emitting laser (VCSEL) wherewith thin, sub-half-lambda-thick Six Ny layers... View full abstract»

• ### Towards a Supercontinuum Generation in an All-Fiberized Holmium-Doped ZBLAN Fiber Amplifier

Publication Year: 2018, Page(s):3193 - 3197
| | PDF (850 KB)

A supercontinuum (SC) was first generated in a holmium-doped ZBLAN (ZrF4−BaF2−LaF 3−AlF3−NaF) fiber amplifier (HDZFA) with a spectral coverage of 2.03–2.9 μm, then was further red-shifted to 3.7 μm by cascading a piece of passive ZBLAN fiber. The amplifier consisted of a 2050-nm pulsed fiber ... View full abstract»

• ### Analytical Solution of Amplitude Ratio in Optical Phase Quantization Based on Phase Sensitive Amplification

Publication Year: 2018, Page(s):3198 - 3204
| | PDF (1237 KB)

A detailed derivation is presented for the analytical solution of the optimal amplitude ratio m between the signal and its harmonic for M-level optical phase quantization of a signal with uniform phase distribution based on the phase sensitive amplification. A new method is proposed to evaluate the performance of phase quantization by calculating the first-order a... View full abstract»

• ### Fiber-Wrapped Mandrel Microphone for Low-Noise Acoustic Measurements

Publication Year: 2018, Page(s):3205 - 3210
| | PDF (632 KB) |  Media

A low-noise fiber optic microphone has been developed using a fiber-wrapped mandrel as the acoustic transducer. The microphone has an average sensitivity of 0.206 rad/Pa between acoustic frequencies of 50 Hz and 16 kHz and a minimum detectable pressure as low as 3 μPa/Hz1/2. The noise floor of the microphone approaches the thermal ... View full abstract»

• ### Interference Characterization in Downlink Li-Fi Optical Attocell Networks

Publication Year: 2018, Page(s):3211 - 3228
| | PDF (1816 KB)

Wireless access to data using visible light, popularly known as light-fidelity (Li-Fi), is one of the key emerging technologies that promises huge bandwidths and data rates. In Li-Fi, the data are modulated on optical intensities and transmitted and detected using light-emitting diodes (LEDs) and photodiodes, respectively. A network of such LED access points illuminates a given region in the form ... View full abstract»

• ### A Fast Method to Analyze the Fiber Amplifier With the GTWave Pumping Configuration

Publication Year: 2018, Page(s):3229 - 3235
| | PDF (729 KB)

The pump propagation in the GTWave pumping structure is studied with analytical method and the beam propagation method (BPM). The power distribution function $f(xi)=P_0(z)/[P_0(z)+P_1(z)]$ is proved to be independent of the fiber core size and the doping content. Based on this $f(xi)$... View full abstract»

• ### Wavelength-Selective Wide-Angle Light Absorption Enhancement in Monolayers of Transition-Metal Dichalcogenides

Publication Year: 2018, Page(s):3236 - 3241
| | PDF (519 KB)

The monolayers of the transition-metal dichalcogenides (TMDs) supported by a periodic metal nano-groove array with a dielectric spacer are investigated both theoretically and numerically. Numerical results exhibit that an original Fabry–Pérot resonance in the nanogroove enables the high-efficiency absorption of light (up to 61.48%) in monolayer molybdenum disulfide (MoS2<... View full abstract»

• ### Highly Birefringent Single-Mode Suspended-Core Fiber in Terahertz Regime

Publication Year: 2018, Page(s):3242 - 3248
| | PDF (1182 KB)

In this study, we report a highly birefringent terahertz (THz) fiber that contains rectangular air slots in the suspended core. The proposed fiber can provide a high birefringence of the order of 10−2 over a wide frequency region in single-mode operation. An ultrahigh birefringence of 0.078, low effective material loss of 0.39 dB/cm, and low confinement loss of 1.25 ... View full abstract»

• ### Wavelength Separation Tunable 2-Color Soliton Generation and Its Application to 2-Color Fluorescence Multiphoton Microscopy

Publication Year: 2018, Page(s):3249 - 3253
| | PDF (360 KB)

Optical solitons generated through soliton self-frequency shift in optical waveguides, has found the widespread applications in multiphoton microscopy (MPM). The multicolor fluorescence MPM, involving the simultaneous imaging of multiple structures labeled by different fluorophores, typically necessitates multiple-color pulses whose wavelengths match the peak excitation wavelengths of the fluoroph... View full abstract»

• ### Ultra-Low-Noise Mode-Division Multiplexed WDM Transmission Over 100-km FMF Based on a Second-Order Few-Mode Raman Amplifier

Publication Year: 2018, Page(s):3254 - 3260
| | PDF (849 KB)

We demonstrate, for the first time, an ultra-low-noise mode-division multiplexed transmission with eight wavelength-division multiplexed channels over a 100-km few-mode fiber based on a second-order few-mode Raman amplifier. To minimize the mode dependent gain, two backward depolarized pumps at the wavelengths of 1455 nm (75 mW) and 1360 nm (1890 mW) are equally launche... View full abstract»

• ### Design Rules of a Microscale PT-Symmetric Optical Gyroscope Using Group IV Platform

Publication Year: 2018, Page(s):3261 - 3268
| | PDF (775 KB)

We proposed a new readout scheme for an ultrasensitive gyroscope, which uses the physics of the exceptional points of a PT-symmetric system to enhance the device sensitivity. In particular, we demonstrated that the full-width at half-maximum linewidth (ΔωFWHM) of the light exiting the ring resonator system is proportional to the square roo... View full abstract»

• ### Tunable Self-Injected Fabry–Perot Laser Diode Coupled to an External High-Q Si3N4 /SiO2 Microring Resonator

Publication Year: 2018, Page(s):3269 - 3274
| | PDF (579 KB)

The fast-growing fields of coherent optical communications, light detection and ranging (LIDAR), etc., have huge demand for narrow linewidth lasers. While laboratory-scale lasers have high stability with narrow linewidth down to few Hz, they are usually in large size and unable to be integrated with chip-scale optical systems. In this paper, we develop a new on-chip semiconductor laser by introduc... View full abstract»

• ### Real-Time Polarimetric Optical High-Voltage Sensor Using Phase-Controlled Demodulation

Publication Year: 2018, Page(s):3275 - 3283
| | PDF (1751 KB)

Modern smart grid designs demand reliable sensors throughout the power delivery systems, not only to monitor the quality of the electrical energy generated by different technologies (wind, solar, hydroelectric, thermoelectric, nuclear), but also as an integral part of the generation, transmission, and distribution networks control systems. Laser polarimetric interferometry is a very suitable techn... View full abstract»

• ### Multipoint All-Fiber Laser-Ultrasound Transducer Using Cascaded Fiber Waist-Enlarged Fusion Tapers

Publication Year: 2018, Page(s):3284 - 3292
| | PDF (1161 KB)

In this study, we propose and demonstrate a multipoint fiber-optic laser-ultrasound transducer based on fiber waist-enlarged tapers (WETs), which are fabricated by taper fusing two single-mode fibers. The WET structure can effectively extract some of the light energy from the fiber core and transfer it to the cladding to form a series of higher-order modes that can be used to excite ultrasound wav... View full abstract»

• ### Photonic Generation and Transmission of Triangular and Square Waveforms With a Large Repetition Rate Tunable Range

Publication Year: 2018, Page(s):3293 - 3301
| | PDF (802 KB)

A photonic approach to generate and transmit triangular and square-shaped microwave waveforms with a large repetition rate tunable range is proposed and experimentally demonstrated using a dual-polarization quadrature phase-shift keying (DP-QPSK) modulator. The upper dual-parallel Mach-Zehnder modulator (DP-MZM) integrated in the DP-QPSK modulator, which is driven by a microwave signal, is properl... View full abstract»

• ### Femtosecond Laser-Inscribed High-Order Bragg Gratings in Large-Diameter Sapphire Fibers for High-Temperature and Strain Sensing

Publication Year: 2018, Page(s):3302 - 3308
| | PDF (782 KB)

Aiming for structural health monitoring applications in harsh environments, a high-order sapphire fiber Bragg grating (HO-SFBG) written with a femtosecond (fs) laser in a large-diameter sapphire fiber is demonstrated. The radial refractive index modulation area induced by scanning exposure is greater than 60% of the fiber cross-section area. The large mode overlapping area leads to a transm... View full abstract»

• ### The Bowtie Effect in Cylindrical Waveguides

Publication Year: 2018, Page(s):3309 - 3317
| | PDF (826 KB)

Modes in step-index fibers are often studied using a scalar model, born to the approximations allowed by the assumption of low refractive index contrast. Such approximations lead to a perfectly linear polarization in the resulting modes, among which the Bessel-like ones are attracting increasing interest for their many applications. These modes, as described by the scalar model, have a circularly ... View full abstract»

• ### Flexible-Grid Wavelength-Selective Switch Based on Silicon Microring Resonators With Interferometric Couplers

Publication Year: 2018, Page(s):3344 - 3353
| | PDF (1482 KB)

In this paper, a kind of integrated flexible-grid wavelength-selective switch composed of reconfigurable add-drop silicon microring resonators with interferometric couplers is described in detail. Owing to tunable interferometric couplers, the proposed device is capable of realizing an increase in adjustable channel spacing for a given field coupling coefficient. By carefully controlling the path ... View full abstract»

• ### Analysis of a Multibeam Optical Beamforming Network Based on Blass Matrix Architecture

Publication Year: 2018, Page(s):3354 - 3372
| | PDF (3462 KB)

We present an extensive analysis of an optical Blass-matrix architecture as a beamforming network with potential for multibeam operation in wireless systems. Its design relies on the use of phase shifters and Mach–Zehnder Interferometers (MZIs) inside an $Mtimes N$ matrix, and enables the generation of M... View full abstract»

• ### A 7-D Hyperchaotic System-Based Encryption Scheme for Secure Fast-OFDM-PON

Publication Year: 2018, Page(s):3373 - 3381
| | PDF (6264 KB)

In this paper, we propose and experimentally demonstrate a novel two-step I/Q-encryption scheme for improving physical layer security in fast orthogonal frequency division multiplexing passive optical network (fast-OFDM-PON). To meet the requirement of this encryption scheme and further enhance the security, a seven-dimensional hyperchaotic system with five positive Lyapunov exponents is de... View full abstract»

• ### Time-Scheduled Quantum Key Distribution (QKD) Over WDM Networks

Publication Year: 2018, Page(s):3382 - 3395
| | PDF (3013 KB)

Quantum key distribution (QKD) networking over wavelength-division multiplexing (WDM) network infrastructure provides a new paradigm for secure communications across the networks. With limited wavelength resources in existing WDM networks, how to efficiently schedule QKD to provision sufficient secret keys over WDM networks becomes a new challenge. This study proposes a new time-scheduled scheme i... View full abstract»

• ### 30/900 Yb-doped Aluminophosphosilicate Fiber Presenting 6.85-kW Laser Output Pumped With Commercial 976-nm Laser Diodes

Publication Year: 2018, Page(s):3396 - 3402
| | PDF (903 KB)

To incorporate sufficient pumping power, a large-scale Yb-doped aluminophosphosilicate (Al2O3 -P2O5-SiO2, APS) fiber with 30-μm core and 900-μ m inner clad in diameter, i.e., a 30/900 Yb-APS fiber, was theoretically designed and experimentally fabricated by using modified chemical vapor de... View full abstract»

## Aims & Scope

The Journal of Lightwave Technology is comprised of original contributions, both regular papers and letters, covering work in all aspects of optical guided-wave science, technology, and engineering. Manuscripts are solicited which report original theoretical and/or experimental results which advance the technological base of guided-wave technology. Tutorial and review papers are by invitation only. Topics of interest include the following: fiber and cable technologies, active and passive guided-wave componentry (light sources, detectors, repeaters, switches, fiber sensors, etc.); integrated optics and optoelectronics; and systems, subsystems, new applications and unique field trials. System oriented manuscripts should be concerned with systems which perform a function not previously available, out-perform previously established systems, or represent enhancements in the state of the art in general.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Peter J. Winzer
Alcatel-Lucent Bell Labs