Tunable Distributed Amplification Dfb Laser Diode (tda-dfb-ld)

Ishii, H.; Kondo, Y.; Kane, Faith; Yoshikuni, Y.

doi:10.1109/cleopr.1997.610814

Cited by 6 publications

(7 citation statements)

References 8 publications

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“…However, despite this apparent advantage of the DFB-based device concepts, only little experimental data has been presented to date. Decent performance has been obtained from thermally widely tunable DFB-like devices [8], while their electronically tunable counterparts, which are commonly preferred because of their higher tuning speed, have so far only shown comparatively poor performance [5], [9]. In this letter, we demonstrate for the first time state-of-the-art performance of electronically widely tunable DFB-type laser diodes.…”

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confidence: 89%

“…Inherent to all DBR-like lasers [1], [3], [4] is that they require a phase tuning section to adjust the cavity mode location. On the other hand, a phase tuning section is not needed in DFB-like devices [5]- [8]. Hence, they offer potential to facilitate device characterization and control by a reduction of the number of tuning currents, which is desirable as long as the device performance is not impaired.…”

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confidence: 99%

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Sampled grating tunable twin-guide laser diodes with over 40-nm electronic tuning range

Todt

Jacke

Meyer

et al. 2005

IEEE Photon. Technol. Lett.

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confidence: 89%

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confidence: 99%

Sampled grating tunable twin-guide laser diodes with over 40-nm electronic tuning range

Todt

Jacke

Meyer

et al. 2005

IEEE Photon. Technol. Lett.

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“…They can be integrated, for instance, with an electroabsorption (EA) section [1] or in a more complex structure such as an OPLL [2]. In this exemplary case-study, we investigate a tunable distributed amplification (TDA) DFB laser, which served as basic mechanism of the device presented in [5]. We demonstrate how physical design parameters like the number and length of the laser sections influence the wavelength tunability and output power.…”

Section: Multi-section Tunable Lasermentioning

confidence: 99%

Design of complex semiconductor integrated structures

et al. 2009

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Abstract:We present the benefits and limitations for designing complex optical semiconductor-based integrated structures by means of advanced numerical modeling. Multi-section tunable laser designs are presented and their tuning properties are analyzed for different architectures. We introduce a model of an integrated SOA with electroabsorption modulator. Its spectral properties are analyzed function of the parameters of the absorber section, showing the influence on the extinction ration of the generated signal. An InP-type Mach-Zehnder modulator is designed, illustrating the models of Kerr, Frank-Keldysh and QCSE effects. An example of a photo-detector demonstrates how dimensions and absorption parameters can be optimized to increase its detection bandwidth.

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“…Electrical tuning is most suitable because of its fast response. Several kinds of electrically tunable lasers have been developed [1][2][3][4][5]. The control methods need to be kept simple for use in practical applications.…”

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confidence: 99%

High-Speed Wavelength Tuning of Tunable Distributed Amplification DFB-LD in Long Haul Transmission

Nakamoto

Ide

Mori

et al. 2007

OFC/NFOEC 2007 - 2007 Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference

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We clarified for the first time the influence of tuning current noise on linewidth broadening and transmission for TDA-DFB-LD. Suppressing noise at higher frequencies, we demonstrated 300-ns high-speed wavelength switching without degradations in 80-km transmission. IntroductionWavelength tunable lasers with fast tuning speed and broad tuning range covering the C-band are key devices for future photonic network systems that use wavelength routing and switching. Electrical tuning is most suitable because of its fast response. Several kinds of electrically tunable lasers have been developed [1][2][3][4][5]. The control methods need to be kept simple for use in practical applications. Mode-hop-free performance and monolithic integration of the tunable laser array are important for achieving a broad tuning range covering the C-band. A tunable distributed amplification (TDA) DFB laser [1-2] is a single electrically tunable laser, and it has a broad mode-hop-free range in principle and the possibility of monolithic integration with the conventional butt-joint technique. Therefore, the TDA-DFB laser is the most promising electrically tunable laser available.One of the most important device parameters is the spectral linewidth. Linewidth broadening usually causes transmission waveform distortion and dispersion penalty in optical fiber. Generally, there are three causes of linewidth broadening. One is carrier fluctuation in the active region, called a Schawlow-Towns-Henry (STH) laser linewidth. It occurs as a result of fundamental white frequency noise just as it is in the common DFB Laser. Another cause of linewidth broadening is carrier fluctuation in the tuning region, called injection-recombination-shot-noise (IRSN) laser linewidth [7][8]. It occurs as a result of current injection in electrically tunable lasers. The last cause of linewidth broadening is tuning current noise. Tuning current noise from an external circuit directly leads to wavelength fluctuation. The influences of two previous causes of linewidth broadening have been intensely discussed [6-8], but the influence of tuning current noise has never been discussed until now.In this work, we clarified for the first time the influence of tuning current noise on linewidth broadening and transmission characteristics for the TDA-DFB laser. Suppressing noise at higher frequencies, we demonstrated 300-ns high-speed wavelength switching without degradations in 80-km long haul transmission characteristics. Device structure and characteristicsThe basic structure of the TDA-DFB laser is shown in Fig. 1. (a). Active waveguides and tuning waveguides are distributed alternately throughout the entire laser cavity. The length of one active waveguide is equal to that of the tuning waveguide. Diffraction grating is formed under both the active waveguides and the tuning waveguides. The P-side electrodes in each region are connected to each other to form comb-like electrodes. The superimposed spectra of the TDA-DFB laser are shown in Fig. 1. (b). The injection current in the a...

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Tunable Distributed Amplification Dfb Laser Diode (tda-dfb-ld)

Cited by 6 publications

References 8 publications

Sampled grating tunable twin-guide laser diodes with over 40-nm electronic tuning range

Sampled grating tunable twin-guide laser diodes with over 40-nm electronic tuning range

Design of complex semiconductor integrated structures

High-Speed Wavelength Tuning of Tunable Distributed Amplification DFB-LD in Long Haul Transmission

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