Design of two-section dbr laser operating at itu frequencies only by grating current tuning

Feies, Valentin; Montrosset, Ivo

doi:10.1109/jlt.2003.812159

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…12 (blue line). Similar oscillations of power and side mode suppression ratio (SMSR) were also observed in [11] and [12]. These oscillations can be explained by observing the mutual positioning of the cavity modes with respect to the mirror loss spectrum α m (λ) and the net gain spectrum g net (λ), and its variation during the DBR tuning, as is shown in Fig.…”

Section: Model and Simulation Results For Mqw Tldsupporting

confidence: 63%

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Performance of Widely Tunable Multi-Quantum-Well and Bulk Laser Diodes and the Main Limiting Factors

Kyritsis

Zakhleniuk

2017

IEEE J. Quantum Electron.

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The output power and tuning performance of multi-quantum-well (MQW) and bulk InGaAsP/InP-distributed Bragg reflector (DBR) tunable laser diodes (TLDs) are investigated over a wide wavelength tuning range using physics-based PICS3D and VPI laser simulation tools within the travelling-wave formalism. The key result of our simulations is the discovery of a new effect in TLDs due to intervalence band absorption (IVBA) in passive phase and DBR sections, which limits the wavelength tuning range. The physical mechanism responsible for such a behavior is a collapse of the spectral-mode selectivity by the DBR due to large IVBA losses in the phase or/and DBR sections. We fundamentally demonstrate different roles played by the IVBA in the active and passive sections of a TLD. It is shown that the IVBA in passive sections and the carrier relaxation broadening (CRB) of the Lorentzian lineshape function in the lasers' active and passive sections play a crucial role in TLD tuning operation. The IVBA coefficient k IVBA and the intraband relaxation time τ in are the major limiting factors that define the output power variation and the achievable tuning range of the lasers. Both bulk and MQW lasers with small k IVBA demonstrate a wide wavelength tuning range above 30 nm, while for large k IVBA , the tuning range drops below 10 nm. We show that the output power variation with tuning due to the CRB parameter τ in is qualitatively different in bulk and MQW TLDs. The TLD tuning and power performance is also strongly affected by the shapes of the net gain and the cavity mirror loss spectra and their mutual positioning with respect to the lasing cavity mode during the tuning. The limiting parameters k IVBA and τ in as well as gain and mirror loss spectra must be thoroughly evaluated in each TLD structure prior to the device design and optimization in order to achieve the best performance in terms of the wavelength tuning and the output power stability.

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Section: Model and Simulation Results For Mqw Tldsupporting

confidence: 63%

“…In real photonic devices though the gain spectrum profile is more complex, especially in multiple quantum-well (MQW) lasers. There are some exceptions, as in [11], where an approximate power expansion up to the cubic terms of the modal gain spectra was used for a particular two-section TLD design, and near 50% power decrease with tuning has been observed.…”

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confidence: 99%