A laser-diode (LD) driver with interwoven mutually-coupled peaking inductors for high-speed optical networks is presented. Six and four are into two sets of area-effective implementation as well performance enhancement. The proposed circuit fabricated in CMOS 0.18-μm process. area 0.34mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> the maximum operating speed 16Gbps. Compared to a conventional LD CMOS, achieves 1.6 times faster...

This paper discusses bandwidth enhancement technique for high speed amplifier. Inductive peaking is a common practice enhancement, however the area occupied by on-chip inductors heavy disadvantage. We utilize mutually coupled effective inductive peaking. A Laser-Diode (LD) driver optical communication system designed in 0.18μm CMOS. Measurement results show that inductor can achieve 16Gbps operation and 26% reduction compared to conventional shunt

In order to realize a high-speed optical switch for packet switching (OPS), we have been focused on wavelength routing consisting of tunable lasers and an arrayed waveguide grating (AWG), studied distributed amplification (TDA)-distributed feedback (DFB) laser. Previously, achieved by feedforward control based linear theory. this article, higher-speed switching, proposed more accurate model the nonlinearity TDA-DFB We applied our nonlinear 400-GHz-wide 600-GHz-wide realized times 33 ns 39...

We proposed a new control method of the tunable distributed feedback (DFB) laser array (TLA) to realize high-speed optical switching by changing injection current without sacrificing reliability. Previous studies wavelength at DFB lasers achieved sub-second time injecting large active layer. However, caused degradation that seriously reduced lifetime and In this paper, based on fast control, was reduces an averaged increasing temperature. successfully demonstrated 400-GHz-wide switching,...

An on-chip signaling system consists of a CML driver, differential transmission-line and receiver is fabricated. We developed an impedance-unmatched driver for power reduction. The reduces the tail current buffer by tuning load resistance. designed circuit achieves 3mm, 10Gbps/channel signal transmission saves energy per bit 21% compared with conventional impedance-matched driver.

Although there are enormous available bandwidths for license-free visible light communication (VLC), a relatively narrow modulation bandwidth of LED is still an obstacle further application. The carrierless amplitude and phase (CAP) high spectral efficiency technology which has begun to draw more attention in recent years. However, meet the illumination indoor VLC, nonlinear interference quite serious because multipath fading channels. Thus, spectrum VLC with CAP greatly limited by these...

This paper presents high-speed and area-efficient laser-diode driver with interwoven inductor in a 0.18-μm CMOS. We interweave ten peaking inductors for area-effective implementation as well performance enhancement. Interwoven can not only achieve area-efficiency but also tune frequency characteristic. Mutual inductances of enhance bandwidth suppress group delay dispersion. The test chip area is 0.32 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

The lasers for the WDM system with flexible grid need to have highly accurate wavelength tuning and stability. Instead of using optical filters, we propose microwave photonics approach photo-mixing technique laser current controlling. Experimental results show that frequency is stabilized accuracy 0.05GHz.

For photonic-based continuous THz-wave generation for a wireless communication, fiber-based configuration has been used. Without the fiber-optics, system could be minimized by monolithic integration. Thus, based on integration, generator consisting of arrayed light sources and photomixers was proposed. Arrayed that can operated at 600 GHz were designed fabricated. Experimental results showed have practically uniform optical output. And then, 600-GHz power combining directional gain obtained...

The multi-dimensional carrierless amplitude and phase (MD-CAP) modulation is a high spectral efficiency technology which has begun to draw more attention in recent years. Meanwhile, how improve the energy also an important issue within limited bandwidth. In this paper, 3D-CAP with trellis coded constellation been proposed. At premise of increasing transmission bandwidth, bit error rate reduced through unified design channel coding modulation.

We devise cooperative control of injection current and temperature for wavelength switching at the DFB-LD. Prompt change makes high-speed gradual current/temperature results in stabilization lower current. Experiment shows a within 31 ms as well long term with less than 100 mA.

Abstract The lasers for the flexible-grid wavelength division multiplexing (WDM) system are required to have high precision of stability. Previously, we proposed wavelength-controlling distributed feedback laser diode (DFB-LD) with photomixing technique and a microwave filter precisely measure optical frequency error from target value. To enlarge wavelength-capture range, improve detect two different filters in parallel. Experimental results show that range is extended up 4 GHz while still...

We devise an optical-to-wireless media conversion method by XGM at the SOA aiming for a future use THz-wave access. investigate characteristics and performance of our proposed method. configure media-converted data transmission system demonstrate error free transmission.

With the increasing popularity of LED lighting and a growing demand for bandwidth in wireless communication, visible light communication (VLC) is one promising scheme addressing bottleneck emerging broadband access networks. For research field VLC focused on solutions contradiction between massive available limited modulation LED, purpose this paper to design an experiment platform with characteristics high flexibility rapid productization. As result, not only expand concept software defined...

For fast wavelength switching within the full available range of tunable laser array, we investigated a stabilizing method after on injection current to laser's active layer. Experimental results demonstrated that our feedback controller dramatically reduced time from 800 μs 2.0 μs.

The limited modulation bandwidth of incoherent LED light source is one bottleneck application for indoor visible communication. In this paper, a novel spectral and energy efficient optical OFDM scheme based on discrete Hartley transform proposed.

A novel THz‐wave autocorrelator consisting of an optical delay line and high‐speed photodiodes was proposed for the measurement waveforms with a high rate repetition. In this system, waveform is delayed at domain correlated THz domain. Experimental results show clear autocorrelations 100, 200 300 GHz sinusoidal which indicate feasibility method.

This paper presents an area-effective bandwidth enhancement technique using interwoven inductors. Inductive peaking is a common practice for enhancement, however the area overhead of inductors serious issue. We implement six or four into inductor. Furthermore parasitics can be reduced. The proposed inductor applied to laser-diode driver in 0.18µm CMOS. Compared conventional shunt-peaking, circuit achieves 1.6 times faster operation and 60% reduction power consumption under condition same...

This paper presents the fastest laser-diode driver with interwoven peaking inductor in 0.18μm CMOS. Six and four inductors are into two sets of for area-effective implementation as well performance enhancement. The operation speed enhancement proposed circuit is achieved by tuning mutual inductances inductors. area 0.34-mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> maximum operating 16-Gb/s.