A 50 Gb/s 190 mW Asymmetric 3-Tap FFE VCSEL Driver

Belfiore, Guido; Khafaji, Mohammad Mahdi; Henker, Ronny; Ellinger, Frank

doi:10.1109/jssc.2017.2717918

Cited by 38 publications

(11 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, there has been intense research investigating methods to mitigate the non-linearity and the implementation of non-linear equalization methods in such links. Such methods include asymmetric feedforward equalizers [2][3][4][5][6][7][8] and non-linear equalization based on Volterra series equalizers [9][10][11][12], look up tables [13][14][15][16], or machinelearning algorithms [17][18][19][20]. However, all these methods are complex, power hungry and require some sort of digital signal processing (DSP) either at the transmitter or the receiver.…”

Section: Introductionmentioning

confidence: 99%

Linearisation Method of DML-Based Transmitters for Optical Communications Part I: Theory and Simulation Studies

Bamiedakis

Cunningham

Penty

2021

J. Lightwave Technol.

View full text Add to dashboard Cite

The performance of directly-modulated lasers (DMLs) is severely impaired by nonlinear behaviour when operating at high symbol rates. We propose a new linearization method for DML-based transmitters which can significantly reduce nonlinearity. This method, named the "Stretched A" (StrA) method, relies on the generation of an approximation to the ideal modulating current that generates a linear optical output waveform. In Part I of this work, the theoretical framework of the proposed method is presented and detailed simulation studies illustrate its implementation and demonstrate the benefits it offers. Although the method is applicable to any type of DML, the simulation studies presented herein focus on optical links based on vertical-cavity surface-emitting lasers (VCSELs) as these comprise the vast majority of short-reach optical links. Part II of this work presents the proof-of-principle experimental demonstration of this new linearization method and discusses its possible implementations using either analog or digital electronics.

show abstract

Section: Introductionmentioning

confidence: 99%

Linearisation Method of DML-Based Transmitters for Optical Communications Part I: Theory and Simulation Studies

Bamiedakis

Cunningham

Penty

2021

J. Lightwave Technol.

View full text Add to dashboard Cite

show abstract

“…One of the options to mitigate this issue would be to use digital equalization at the receiver level [39]. Another option that is widely used in communication systems is to distort the seed signal with transmitter pre-emphasis [40], so that the aforementioned '0'bits (or '1'bits) actually have a response below (or above, respectively) the decision threshold. These methods are of utter interest and will be evaluated in future work.…”

Section: A Transmission Results With Qclmentioning

confidence: 99%

Free-Space Communication With Directly Modulated Mid-Infrared Quantum Cascade Devices

Spitz

Didier

Durupt

et al. 2022

IEEE J. Select. Topics Quantum Electron.

View full text Add to dashboard Cite

This study deals with the communication capabilities of two kinds of semiconductor lasers emitting in one of the atmosphere transparency windows, around 4 µm. One of these two lasers is a quantum cascade laser and the other one is an interband cascade laser. With the quantum cascade laser, a subsequent attenuation is added to the optical path in order to mimic the attenuation of free-space transmission of several kilometers. Direct electrical modulation is used to transmit the message and two-level formats, non-return-to-zero and return-to-zero, are used and compared in terms of maximum transmission data rate. The sensitivity to optical feedback is also analyzed, as well as the evolution of the error rate when reducing the optical power at the level of the detector. This work provides a novel insight into the development of future secure free-space optical communication links based on midinfrared semiconductor lasers and sheds the light on improvements required to achieve multi-Gbits/s communication with off-the-shelf components.

show abstract

“…Concerning the VCSEL design, Vertilas has already demonstrated, through its InP platform, 1.55 µm-VCSELs with a bandwidth up to 18 GHz and an optical power up to 4 mW at room temperature [3], [6], and the 1.3 µm solution presented in this manuscript achieves similar performance. Concerning the use of proper drivers, the majority of the proposed transmitters including driving circuits, drives the anode of the VCSEL to minimize the supply voltage for both the output and biasing stage [10]- [16]. Nevertheless, in all cases the driver circuit still operates at a lower supply voltage than the VCSEL or output stage.…”

Section: Introductionmentioning

confidence: 99%

Optical Transmitter Based on a 1.3-μm VCSEL and a SiGe Driver Circuit for Short-Reach Applications and Beyond

Malacarne

Neumeyr

Soenen

et al. 2018

J. Lightwave Technol.

View full text Add to dashboard Cite

Long-wavelength vertical-cavity surface-emitting lasers (LW-VCSELs) with emission wavelength in the 1.3-µm region for intensity modulation (IM)/direct detection optical transmissions enable longer fiber reach compared to C-band VCSELs, thanks to the extremely low chromatic dispersion impact at that wavelength. A lot of effort has been recently dedicated to novel cavity designs in order to enhance LW-VCSELs' modulation bandwidth to allow higher data rates. Another approach to further improve VCSEL-based IM speed consists of making use of dedicated driver circuits implementing feedforward equalization (FFE). In this paper, we present a transmitter assembly incorporating a fourchannel 0.13-µm SiGe driver circuit wire-bonded to a novel dual 1.3-µm VCSEL array. The short-cavity indium phosphide buried tunnel junction VCSEL design minimizes both the photon lifetime and the device parasitic currents. The integrated driver circuit requires 2.5-V supply voltage only due to the implementation of a pseudobalanced regulator; it includes a two-tap asymmetric FFE, where magnitude, sign, relative delay, and pulse width distortion of the taps can be modified. Through the proposed transmitter, standard single-mode fiber reach of 20 and 4.5 km, respectively, for 28-and 40-Gb/s data rate has been demonstrated with stateof-the-art power consumption. Transmitter performance has been analyzed through pseudorandom bit sequences of both 2 7 −1 and 2 31 −1 length, and the additional benefit due to the use of the driver circuit has been discussed in detail. A final comparison with stateof-the-art VCSEL drivers is also includedt.

show abstract

A 50 Gb/s 190 mW Asymmetric 3-Tap FFE VCSEL Driver

Cited by 38 publications

References 15 publications

Linearisation Method of DML-Based Transmitters for Optical Communications Part I: Theory and Simulation Studies

Linearisation Method of DML-Based Transmitters for Optical Communications Part I: Theory and Simulation Studies

Free-Space Communication With Directly Modulated Mid-Infrared Quantum Cascade Devices

Optical Transmitter Based on a 1.3-μm VCSEL and a SiGe Driver Circuit for Short-Reach Applications and Beyond

Contact Info

Product

Resources

About