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# IEEE Photonics Journal

## Filter Results

Displaying Results 1 - 25 of 59
• ### Investigation of Q-Switching Characteristics in Single- and Double-Spacing Multi-Wavelength Brillouin Erbium Fiber Laser

Publication Year: 2013, Article Sequence Number: 1400206
Cited by:  Papers (2)
| | PDF (540 KB) | HTML

A multi-wavelength Brillouin erbium fiber laser (BEFL) with a Q-switching characteristic is demonstrated using a piece of non-zero dispersion shifted fiber (NZ-DSF) as a Brillouin gain medium (BGM) in conjunction with relaxation oscillation technique. The performance of the multi-wavelength short pulse generation is investigated for two different BEFL configurations for single and double Brillouin... View full abstract»

• ### Monolithically Integrated 4-Channel-Selectable Light Sources Fabricated by the SAG Technology

Publication Year: 2013, Article Sequence Number: 1400407
Cited by:  Papers (5)
| | PDF (874 KB) | HTML

The monolithic integration of four 1.5-μm InGaAsP/InP distributed feedback (DFB) lasers with a 4 × 1 multimode-interference (MMI) optical combiner using the selective area growth and butt-joint regrowth technologies is proposed and demonstrated. A dry-etching stop layer is grown to guarantee the etching depth of MMI. The four channels could match the ITU wavelength grid of 200-GHz we... View full abstract»

• ### Continuous-Wave Ultraviolet Generation at 349 nm by Intracavity Frequency Doubling of a Diode-Pumped $hbox{Pr:LiYF}_{4}$ Laser

Publication Year: 2013, Article Sequence Number: 1500905
Cited by:  Papers (4)
| | PDF (333 KB) | HTML

We report a continuous-wave ultraviolet laser at 349 nm obtained by intracavity frequency doubling of a diode-pumped Pr3+-doped LiYF4 laser. Power scaling of lasers at 698-nm fundamental wavelength was realized using an InGaN laser diode with a maximum output power of 850 mW and a 5-mm-long 0.5 a.t. % laser crystal. The maximum output power at 698 nm was 215 mW. With beta bar... View full abstract»

• ### Pulsed Wavelength-Tunable Brillouin Fiber Laser Based on a Fourier-Domain Mode-Locking Source

Publication Year: 2013, Article Sequence Number: 1500907
Cited by:  Papers (1)
| | PDF (802 KB) | HTML

In this work, a pulsed wavelength-tunable Brillouin fiber laser based on a Fourierdomain mode-locking (FDML) source with a repetition rate of 4.2 kHz is presented. The tunable Brillouin laser is formed by a fiber-ring cavity (for the Stokes signal amplification) within a primary fiber-ring cavity for generating an FDML signal. The primary cavity is formed by an erbium-doped fiber amplifier and a f... View full abstract»

• ### 150-Channel Four Wave Mixing Based Multiwavelength Brillouin-Erbium Doped Fiber Laser

Publication Year: 2013, Article Sequence Number: 1501010
Cited by:  Papers (10)
| | PDF (927 KB) | HTML

A wide band tunable multiwavelength Brillouin-erbium fiber laser (BEFL) is developed. In this structure, the laser is formed between a double pass amplification box and a highly nonlinear fiber (HNLF), which acts as a virtual mirror, results in removing the reflective physical mirror from one side of the laser structure. A large number of Stokes and anti-Stokes lines are generated through cascadin... View full abstract»

• ### 2.0-$muhbox{m}$ Q-Switched Thulium-Doped Fiber Laser With Graphene Oxide Saturable Absorber

Publication Year: 2013, Article Sequence Number: 1501108
Cited by:  Papers (22)
| | PDF (839 KB) | HTML

A compact Q-switched thulium-doped fiber laser (TDFL) operating near the 2.0- μm region is proposed and demonstrated. The proposed laser uses a 2-m-long thulium-doped fiber with a core absorption of 27 dB/m at 793 nm as the active medium and a graphene oxide (GO)-based saturable absorber (SA) as the Q-switching element. The SA is fabricated by optically depositing GO particles dissolved in ... View full abstract»

• ### Ultrafast Electrically Pumped VECSELs

Publication Year: 2013, Article Sequence Number: 1501207
Cited by:  Papers (2)
| | PDF (645 KB) | HTML

We present an improved design for electrically pumped vertical external-cavity surface-emitting lasers (EP-VECSELs) optimized for passive modelocking with a semiconductor saturable absorber mirror (SESAM). In continuous-wave (cw) multimode operation, up to 170 mW of output power are demonstrated at a wavelength of 967 nm. Overcoming our prior limitation, we demonstrate fundamental transverse mode ... View full abstract»

• ### Distinct Lasing Operation From Chirped InAs/InP Quantum-Dash Laser

Publication Year: 2013, Article Sequence Number: 1501308
Cited by:  Papers (4)
| | PDF (906 KB) | HTML

We study the enhanced inhomogeneity across the InAs quantum-dash (Qdash) layers by incorporating a chirped AlGaInAs barrier thickness in the InAs/InP laser structure. The lasing operation is investigated via Fabry-Pérot ridge-waveguide laser characterization, which shows a peculiar behavior under quasi-continuous-wave (QCW) operation. Continuous energy transfer between different dash ensem... View full abstract»

• ### Design of Mid-IR $hbox{Er}^{3+}$-Doped Microsphere Laser

Publication Year: 2013, Article Sequence Number: 1501308
Cited by:  Papers (11)
| | PDF (612 KB) | HTML

A mid-IR lasing system based on a tapered fiber coupled to an Er3+-doped microsphere has been modeled and numerically investigated. In order to design and optimize the device performance, a dedicated 3-D numerical code exploiting the coupled mode theory and the rate equations model has been developed. The main energy level transitions among the Er3+ ions, the most relevant se... View full abstract»

• ### Dual-Wavelength, Linearly Polarized All-Fiber Laser With High Extinction Ratio

Publication Year: 2013, Article Sequence Number: 1501406
Cited by:  Papers (11)
| | PDF (316 KB) | HTML

We demonstrate a dual-wavelength linearly polarized all-fiber laser emitting 1- μm and 1.5- μm wavelengths with a total output power of 1.3 W. The laser consists of two pairs of fiber Bragg gratings (FBGs) fabricated on PM fibers to form a cavity and an Er/Yb co-doped fiber as a gain medium. A high extinction ratio of 23 dB is achieved using specially designed PM FBGs. The laser outp... View full abstract»

• ### Two-Part Gauss Simulation of Phosphor-Coated LED

Publication Year: 2013, Article Sequence Number: 1600110
Cited by:  Papers (7)
| | PDF (963 KB)

Gauss simulation is an effective tool for designing light-emitting-diode (LED) light sources. This paper proposes a new two-part Gauss simulation model to simulate a YAG:Ce phosphor-coated LED (PC-LED). This model divides the emission spectra of YAG:Ce phosphor into two parts, and they use different half spectral widths in the Gauss function to accurately simulate the spectra of YAG:Ce PC-LED. The... View full abstract»

• ### Effect of Quantum Barrier Thickness in the Multiple-Quantum-Well Active Region of GaInN/GaN Light-Emitting Diodes

Publication Year: 2013, Article Sequence Number: 1600207
Cited by:  Papers (6)  |  Patents (2)
| | PDF (658 KB) | HTML

The dependence of the polarization-induced electric field in GaInN/GaN multiple-quantum-well light-emitting diodes (LEDs) on the GaN quantum barrier (QB) thickness is investigated. Electrostatic arguments and simulations predict that a thin QB thickness reduces the electric field in the quantum wells (QWs) and also improves the LED efficiency. We experimentally demonstrate that the QW electric fie... View full abstract»

• ### The Advantages of AlGaN-Based UV-LEDs Inserted With a p-AlGaN Layer Between the EBL and Active Region

Publication Year: 2013, Article Sequence Number: 1600310
Cited by:  Papers (13)
| | PDF (1109 KB) | HTML

The advantages of ultraviolet light-emitting diodes (LEDs) inserted with a p-AlGaN layer, whose Al mole composition is less than that of the last barrier, between the last barrier and the electron blocking layer have been investigated by using the Crosslight APSYS programs. The results show that the output power and the internal quantum efficiency of the proposed LEDs are improved. Furthermore, th... View full abstract»

• ### Numerical Simulation of Dynamic Bandgap Control in All-Solid Chalcogenide–Tellurite Photonic Bandgap Fiber

Publication Year: 2013, Article Sequence Number: 2202206
Cited by:  Papers (3)
| | PDF (373 KB) | HTML

Dynamic bandgap control in all-solid chalcogenide-tellurite photonic bandgap fiber (PBGF) by the refractive index changes due to the optical Kerr effect is numerically simulated in this paper. The core and the cladding with low index are designed by the tellurite glass TeO2-ZnO-Li2O-Bi2O3, whereas the high-index rods are designed by the chalcogenide glas... View full abstract»

• ### Nonperiodic Oscillation With Wavelength of Mode Guided in a Special Ti-Diffused $hbox{LiNbO}_{3}$ Waveguide Structure

Publication Year: 2013, Article Sequence Number: 2202307
| | PDF (585 KB) | HTML

We report an abnormal waveguiding phenomenon that the fundamental mode guided in strip waveguides of a special Ti-diffused LiNbO3 waveguide structure, in which an array of 4and 6-μm-wide strip waveguides is embedded in a planar waveguide, nonperiodically oscillates with the wavelength along the waveguide width direction. The oscillation amplitude reaches 2 μm. The oscillat... View full abstract»

• ### A Sub-$lambda$-Size Modulator Beyond the Efficiency-Loss Limit

Publication Year: 2013, Article Sequence Number: 2202411
Cited by:  Papers (21)
| | PDF (689 KB) | HTML

Electrooptic modulators (EOMs) are key devices in performing the conversion between the electrical and optical domains in data communication links. With respect to a road map for photonic computing, future EOMs are required to be highly scalable, should feature strong modulation performance, and must not consume much power during operation. In light of these requirements, here, we investigate indi... View full abstract»

• ### Photonic-Crystal-Based Optical Fiber Bundles and Their Applications

Publication Year: 2013, Article Sequence Number: 2400213
| | PDF (1381 KB) | HTML

A simple method to create two-dimensional or three-dimensional periodic nano-structures on optical fiber bundle end facets (FBEFs) is proposed and demonstrated, and periodicity of these nano-structures can be controlled. Polystyrene opal films and silica inverse opal films were fabricated on single-mode optical FBEFs by vertical self-assembly and sol-gel co-assembly methods. Optical properties of ... View full abstract»

• ### Si-Ge-Silica Monolithic Integration Platform and Its Application to a 22-Gb/s $times$ 16-ch WDM Receiver

Publication Year: 2013, Article Sequence Number: 4500407
Cited by:  Papers (15)
| | PDF (728 KB) | HTML

We describe a Si-Ge-silica monolithic integration platform for telecommunications applications. The monolithic integration process features low-temperature silica film deposition by electron-cyclotron-resonance chemical vapor deposition to prevent thermal damage to Si/Ge active devices. The monolithically integrated Si and SiOx waveguides show propagation losses of 2.8 and 0.9 dB/cm, and the inver... View full abstract»

• ### Generation of Multiple Plasmon Resonances in a Nanochannel

Publication Year: 2013, Article Sequence Number: 4500509
| | PDF (1293 KB) | HTML

In this paper, we investigate the coupling of surface plasmon based on Kretschmann configuration (KC) to localized and delocalized surface plasmon modes supported by metallic nanowire grating (MG) at the oblique incidence. The designed structure consists of MG deposited on a substrate positioned upside down above a conventional KC at a certain distance. Mode coupling and resonant interactions betw... View full abstract»

• ### A Photonic Microwave Filter Based on an Asymmetric Silicon Mach-Zehnder Modulator

Publication Year: 2013, Article Sequence Number: 5501006
Cited by:  Papers (2)
| | PDF (593 KB) | HTML

A new approach for implementing an integrable photonic microwave filter based on exploiting the asymmetry of a CMOS-compatible silicon Mach-Zehnder modulator is demonstrated. The strong dependence of the modulator response with wavelength is exploited for achieving positive and negative taps and, therefore, a fully reconfigurable filter, without the complexity of previous approaches. Two filter re... View full abstract»

• ### Linearized Frequency Doubling for Microwave Photonics Links Using Integrated Parallel Mach–Zehnder Modulator

Publication Year: 2013, Article Sequence Number: 5501108
Cited by:  Papers (1)
| | PDF (777 KB) | HTML

In microwave photonics links (MPLs), the multicarrier microwave signals are subjected to intermodulation distortion (IMD) and degrades the linearity of the MPL significantly. A linearization scheme is presented with an integrated parallel Mach-Zehnder modulator (MZM), without requiring optical/electrical filters and optical delays. In addition, to reduce the requirements on the electrical and opti... View full abstract»

• ### Tandem Electrooptic Modulation and Interferometric Detection: Theory and Application

Publication Year: 2013, Article Sequence Number: 5501211
Cited by:  Papers (3)
| | PDF (1308 KB) | HTML

This paper expands upon the RF photonic theory of electrooptic phase and intensity modulation detection as seen when coupled in tandem with an asymmetric Mach-Zehnder interferometer through the derivation of power transfer functions for such optical-microwave configurations. An inspection of the theory is presented and validated through experimental results. Several applications of a modulation/in... View full abstract»

• ### Integration of Photonic Crystal Splitter and Slow Light Waveguide for a Microwave Photonic Filter

Publication Year: 2013, Article Sequence Number: 5501311
Cited by:  Papers (1)
| | PDF (1540 KB) | HTML

We theoretically investigate an ultracompact integration of a photonic crystal (PC) splitter and a slow-light waveguide for a microwave photonic filter. We realize the filter characteristics with a free spectrum range of 130 GHz and a notch depth of 10 dB, and the whole length is only 24.8 μm with the use of a slow-light PC waveguide as a delay line. The splitter is fabricated with the dela... View full abstract»

• ### All-Optical Microwave Photonic Single-Passband Filter Based on Polarization Control Through Stimulated Brillouin Scattering

Publication Year: 2013, Article Sequence Number: 5501411
Cited by:  Papers (9)
| | PDF (826 KB) | HTML

We present a novel microwave photonic single-passband filter based on polarization control through simulated Brillouin scattering (SBS). The principle of the filter is based on a vector SBS process, which is different from the previously reported scalar SBS technique. For a radio-frequency (RF) modulated signal launched to the proposed processor, the state of polarization (SOP) of the optical carr... View full abstract»

• ### Photonic Generation of Binary Phase-Coded Microwave Signals With Large Frequency Tunability Using a Dual-Parallel Mach–Zehnder Modulator

Publication Year: 2013, Article Sequence Number: 5501507
Cited by:  Papers (11)
| | PDF (810 KB) | HTML

We present a photonic approach to generating binary phase-coded microwave signals with large frequency tunability using a dual-parallel Mach-Zehnder modulator (DPMZM). The DPMZM consists of a pair of sub-MZMs embedded in the two arms of a parent MZM. In our scheme, one of the sub-MZMs is fed by a sinusoidal microwave signal to be phase-coded, and the other sub-MZM is driven by a rectangular coding... View full abstract»

## Aims & Scope

IEEE Photonics is an online-only rapid publication archival journal of top quality research at the fore-front of Photonics.  Photonics integrates quantum electronics and optics to accelerate progress in the generation of novel photon sources and in their utilization in emerging applications at the micro and nano scales spanning from the far-infrared/THz to the x-ray region of the electromagnetic spectrum.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Niloy Dutta
Physics Department
University of Connecticut
Storrs, CT 06269
nkd@phys.uconn.edu
Tel: +1 860-486-3481
Fax: +1 860-486-3346