Analysis and design criteria of three-section DBR tunable lasers

Caponio, N.; Goano, Michele; Maio, Ivano Adolfo; Meliga, M.; Bava, G.P.; Destefanis, G.; Montrosset, Ivo

doi:10.1109/49.57827

Cited by 33 publications

(11 citation statements)

References 20 publications

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“…The longitudinal mode structure for the device can be explored by varying the rear and phase currents to produce a tuning map similar in structure to a threesection DBR tuning map [12]. However, at the same time as varying the rear current we also vary the front current settings so that we track along one of the thick diagonal lines in figure 6a.…”

Section: Wavelength Tuningmentioning

confidence: 98%

Monolithic DBR-type fullband tunable lasers

Carter

2005

Optoelectronic Materials and Devices for Optical Communications

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Section: Wavelength Tuningmentioning

confidence: 98%

Monolithic DBR-type fullband tunable lasers

Carter

2005

Optoelectronic Materials and Devices for Optical Communications

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“…cm3 in the passive sections, this absorption change corresponds to 4.4 nm tuning. (In a more rigorous calculation, one should also include the fact that a larger implies higher threshold carrier density in the active section, which will give rise to an additional phase shift due to thermal and bandfilling effects, see for instance [26]). …”

Section: Introductionmentioning

confidence: 99%

Active DBR filters for 2.5 Gb/s operation: linewidth, crosstalk, noise, and saturation properties

Sahlen

1992

J. Lightwave Technol.

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The design of four-section distributed Bragg reflector (DBR) laser filters, for application in wavelength multiplexed systems with 2.5-Gb/s bitrate on each wavelength channel, has been analyzed. The results of the analysis indicate that optimized filters will support at least 10 channels and will have a dynamic range exceeding 10 dB. Bit error rate (BER) measurements on three-section DBR filters in a 2.4-Gb/s system experiment support this conclusion.

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“…Equivalent-circuit models for the most frequently adopted singleequivalent circuit [5,7,8] have been established for a long time, and the model parameters can be formulated in a simple analytical form [7]. To include various high-order parasitic effects, a ladder structure and a transformer-loop structure have been proposed within the framework of the singlemodel [9,10].…”

mentioning

confidence: 99%

“…In the conventional model [7], only the overlap capacitance has been considered. As the spacing between metal spirals becomes smaller, the contribution from the coupling capacitance becomes substantial and has to be considered.…”

mentioning

confidence: 99%

Analysis and selection of optimum driving current combinations for tunable wavelength laser

Lee¹,

Yang²,

Chuang³

et al. 2006

Micro & Optical Tech Letters

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We present a demodulation technique to synthesise the physical parameters of an optical fibre Bragg grating (FBG) resonant cavity. The demodulation is achieved through a genetic algorithm (GA INTRODUCTIONIn the past, the all in-fibre resonators have been used for several different applications, from sensors to fibre laser resonators [1]. Recently, we have shown the possibility of realizing optical clock recovery recurring to ring lasers by using an intracavity gain clamped semiconductor optical amplifier and a resonant cavity based on Bragg gratings and on tuneable resonant cavities [2, 3].The correct extraction of parameters for a single fibre Bragg grating (FBG) or grating structures is of high relevance for device design and system simulation [4]. Several techniques have been proposed for the demodulation of FBG parameters [5 and references therein]. All of these require previous knowledge of the amplitude and phase spectrum. The experimental measurement of the latte is quite complex and has implicit an error when determined experimentally. These errors will propagate through the recovered parameters.Recently, Caucheteur et al. proposed a demodulation technique for fibre cavity resonators based uniquely on the adjustment of the amplitude spectrum [5]. However, for that propose a Nelder-Mead simplex algorithm was used, which has small robustness with respect to the initial parameters. Skaar et al. proposed the usage of a genetic algorithm for the reconstruction of FBG-based sensors [6].In this paper we propose, for the first time, utilization of a genetic algorithm (GA) to achieve the demodulation of a resonant cavity based on FBGs. RESONANT CAVITYThe resonant cavity was developed inscribing two low-reflectivity FBGs, approximately 1-cm apart, in a commercial high borongermanium co-doped optical fibre (Fibercore PS1250/1500). The fibre was placed on a motorized translation stage, thus allowing an , recurring to the phase-mask method. The experimental conditions were kept constant during the writing process, so it was expected that the parameters values for both gratings would be kept approximately constant. The cavity-reflection spectrum was measured using the phase-shift method, and a total of 311 data points were measured.The cavity complex reflection spectrum, for weak grating pairs, can be given bywhen r 1 () and t 1 () the reflection and transmission of the first grating, respectively. r 2 () is the reflection of the second grating, d represents the intragrating spacing, and n eff is the effective refraction index. The uniform grating reflection or transmission can be obtained analytically [7]. The objective is to find the cavity and FBG parameters coefficient that produce a reflection coefficient as close as possible to the target spectrum. To determine the correct parameters, we have implemented an algorithm which minimizes the errors between the measured spectrum and the analytical one, generated by Eq. (1), using a GA. The GA is an optimization method that requires only the information of the...

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Analysis and design criteria of three-section DBR tunable lasers

Cited by 33 publications

References 20 publications

Monolithic DBR-type fullband tunable lasers

Monolithic DBR-type fullband tunable lasers

Active DBR filters for 2.5 Gb/s operation: linewidth, crosstalk, noise, and saturation properties

Analysis and selection of optimum driving current combinations for tunable wavelength laser

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