Single-Chip Wavelength Conversion Using a Photocurrent-Driven EAM Integrated With a Widely Tunable Sampled-Grating DBR Laser

Sysak, M.N.; Barton, J.S.; Johansson, Leif; Raring, J.W.; Skogen, Erik J.; Masanovic, M.L.; Blumenthal, D.J.; Coldren, L.A.

doi:10.1109/lpt.2004.833069

Cited by 19 publications

(11 citation statements)

References 7 publications

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“…Results from this device showed greater than 10 dB optical extinction ratio with 12.6dBm of input fiber power required at 2.5 Gb/s. BER measurements at this data rate showed less than 2.5 dB power penalties over 40 nm of operation [27]. Unfortunately, due to high waveguide doping levels (Nd = 2e17 cm-3), and a high waveguide bandgap energy (λ b 1.4 um), the Franz-Keldysh based devices did not prove to scale well to higher data rates.…”

Section: Electroabsorption Based Devicesmentioning

confidence: 88%

“…PD-WC refer to devices that rely on the generation of photocurrent from an incident light signal in a detecting region to change the voltage on a transmitting region at an output wavelength. [ 27,29] All three of the devices in this paper use the same SGDBR mirror design using a front Sampled Grating mirror (FM) with 5 4µm bursts with a 68.5µm sampling period, a 75um long phase section (Ph), as well as 12 6µm bursts with a 61.5µm sampling period Rear mirror (RM) similar to described previously [24]. This design yields over 38nm of tuning before wrap around.…”

Section: Introductionmentioning

confidence: 99%

“…Externally modulated devices have an output SOA that is 400µm long that use the same material as the gain section of the laser. These transmitting regions can involve either the modulation of a single gain region [21] or bipolar cascade of gain regions [23], an external modulator such as an Electro-absorption(EA) [27,29] or Mach-Zehnder(MZ) [12] as shown in fig.2. Fig.…”

Section: Introductionmentioning

confidence: 99%

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Widely tunable photocurrent-driven wavelength converters

et al. 2005

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Wavelength converters are seen as important to the scalability, flexibility, and cost of future optical networks. These devices have opportunities for deployment in optical switches, routers and add/drop multiplexers. This talk will outline the latest results of monolithic and hybrid photocurrent-driven wavelength converters (PD-WC) based on either the direct modulation of a bipolar cascade SGDBR laser or by external modulation using an Electro-absorption (EA), or Mach-Zehnder (MZ) modulator using integration building blocks such as a semiconductor optical amplifiers (SOA), SGDBR lasers, PIN detectors and EA and MZ modulators. As the input and output waveguides are separate in this configuration of wavelength converter, an optical filter is not required to reject the input signal at the output which is desirable particularly with wavelength tunable applications where the response time of a filter could limit system performance.

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Section: Electroabsorption Based Devicesmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Widely tunable photocurrent-driven wavelength converters

et al. 2005

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“…1,2 It is a key technology in the development of future optoelectronic systems. A less spectacular application of such tunable lasers but economically more compelling is in the area of inventory reduction.…”

Section: Introductionmentioning

confidence: 99%

Sampled-grating DBR lasers: calibrated 3D simulation of tuning characteristics

Schneider¹,

Pfeiffer²,

Piprek³

et al. 2005

SPIE Proceedings

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We present a calibrated full-3D simulation of a widely-tunable sampled-grating distributed Bragg reflector (SGDBR) laser showing the characteristic quasi-continuous tuning map. The SGDBR laser is a longitudinally integrated device consisting of five waveguide sections: a front and rear mirror section together with a phase section allow for quasi-continuous tuning over a wavelength range of 100nm, while an active section provides the optical gain for the laser operation. For real world applications the tuning behavior needs to be well understood in order to guarantee stable operation for each wavelength channel. Due to the strong inhomogeneities both in the transverse and longitudinal dimensions a 3D simulation model is necessary to cover the full complexity of such devices. In our physics-based approach, we solve the fully coupled semiconductor drift-diffusion equations for electrons and holes, taking into account longitudinal current flux in full 3D. Gain calculation and the photon rate equation are included self-consistently in an iterative Newton scheme. The optical field is composed of several transverse mode patterns combined with the longitudinal field distribution as obtained by a transfer matrix formalism. By means of a Gummel-type iteration scheme a self-consistent solution of the optics and electronics is found. We show that this approach succeeds even in the numerically most challenging case of discrete wavelength jumps as observed in typical tuning maps of SGDBR lasers. Our simulations are in good agreement with measurements and prove the suitability of the simulator for the design and optimization of state-of-the-art tunable lasers.

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“…Once the packet delineation has been carried out, the synchroniser can be configured by an electronic signal corresponding to the time difference between the arriving packet and the reference clock. In this Letter, a method of optical packet synchronisation based on fibre Bragg gratings (FBGs) combined with tunable wavelength converters (TWCs) [2][3][4] is proposed and demonstrated.The configuration is shown in Fig. 1.…”

mentioning

confidence: 99%

Demonstration of 40 Gbit/s optical packet synchronisation using fibre Bragg gratings and fast-tunable wavelength converters

et al. 2006

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A method of all-optical synchronisation is proposed and demonstrated at 40 Gbit=s. Based on pre-programmable fibre Bragg grating array and fast-switched widely-tunable wavelength converters, negligible power penalty is achieved up to 1 ms delay as well as 100% layer 2 throughput.Introduction: All-optical packet switching networks [1] are becoming the solution of fast-growing telecommunication with the advantages of scalability and efficiency by reducing O=E=O conversion and higher available data rate beyond current electronic routing technologies. To ease the design of the key component, the optical packet switch, the incoming packets need to be aligned to a common time reference to eliminate the delay variations introduced by factors such as different routes in networks, fibre chromatic dispersion and thermal expansion in the links. The start of the arriving packet can be determined by a packet delineation function beforehand. Once the packet delineation has been carried out, the synchroniser can be configured by an electronic signal corresponding to the time difference between the arriving packet and the reference clock. In this Letter, a method of optical packet synchronisation based on fibre Bragg gratings (FBGs) combined with tunable wavelength converters (TWCs) [2][3][4] is proposed and demonstrated.The configuration is shown in Fig. 1. A series of FBGs with different centre wavelengths are deployed along the fibre to form a wavelengthdependent delay line. The header part of the incoming packet is removed before the optical synchroniser. During synchronisation the payload is converted by a rapidly-tunable WC to one of the FBG centre wavelengths according to the required delay value. The outgoing delayed payload is then forwarded to the next switching stage where it is converted to a desired wavelength by the second TWC. Here we use an InP-based Mach-Zehnder interferometric wavelength converter monolithically integrated with a fast tunable SGDBR as characterised in [4,5]. It has an output switching window of 6 ps, extinction ratio >9 dB, less than 4 dB power penalty at 10 À9 BER and low pattern dependence across a 25 nm tuning range operating at 40 Gbit=s using RZ signals, which demonstrate its feasibility for this application.

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Single-Chip Wavelength Conversion Using a Photocurrent-Driven EAM Integrated With a Widely Tunable Sampled-Grating DBR Laser

Cited by 19 publications

References 7 publications

Widely tunable photocurrent-driven wavelength converters

Widely tunable photocurrent-driven wavelength converters

Sampled-grating DBR lasers: calibrated 3D simulation of tuning characteristics

Demonstration of 40 Gbit/s optical packet synchronisation using fibre Bragg gratings and fast-tunable wavelength converters

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