Cavity designs for nitride VCSELs with dielectric DBRs operating efficiently at different temperatures

Sarzała, Robert P.; Śpiewak, Patrycja; Nakwaski, W.; Wasiak, Michał

doi:10.1016/j.optlastec.2020.106482

Cited by 10 publications

(4 citation statements)

References 16 publications

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“…The simulations were performed using a program written by the Photonics Group of the Institute of Physics at Lodz University of Technology. The program simulates physical phenomena occurring during the operation of semiconductor lasers and their arrays [15]. The part used to model thermal phenomena is based on a 3D finite element method (FEM).…”

Section: Numerical Modelmentioning

confidence: 99%

Opto-Electronics Review

Dąbrówka,

Sarzała,

Wasiak

et al. 2022

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This paper presents the results of a thermal computational analysis of a two-dimensional laser array emitting from a surface. The array consisted of eight equispaced ridge-waveguide edge-emitting nitride diode lasers. Surface emission of light was obtained using mirrors inclined at 45°. The authors investigate how the geometrical dimensions of the array emitters and their pitch in the array affect the increase and distribution of temperature in the device. They also examine the influence on the temperature increase and distribution of the thickness of the insulating SiO2, the thickness of the gold layer forming the top contact of the laser, and the thickness of the GaN substrate, as well as the influence of the ridge-waveguide width.

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Section: Numerical Modelmentioning

confidence: 99%

Opto-Electronics Review

Dąbrówka,

Sarzała,

Wasiak

et al. 2022

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“…In fact, to the best of our knowledge, DFB, DBR laser diodes, as well as VCSEL, are not commercially available in the blue spectral region coinciding with the strong absorption cross-section of NO 2 gas molecule. [11][12][13][14][15][16][17][18] The approach to ensure single-mode emission from the blue Fabry-Perot laser diode consists of modifying the resonator by extending the normal laser cavity. This is achieved by adding a frequency-selective element, such as a diffraction grating, placed outside the laser diode cavity.…”

Section: Introductionmentioning

confidence: 99%

Littrow configuration tunable external cavity diode laser with narrowband emission at 448 nm

Gasmi,

Aljalal,

Al-Basheer

2024

Semiconductor Lasers and Laser Dynamics XI

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A single-mode external cavity diode laser (ECDL) emitting in the blue spectral region is developed. The ECDL, which uses a low-power Fabry-Perot laser diode, is designed in the Littrow configuration using a reflective holographic grating. The ECDL has a narrowband emission at 448 nm of 0.01 nm that coincides with a strong absorption cross-section of NO 2 gas molecule, tuning ranges of 4.0 nm just above the threshold and 0.2 nm at high injection current. A maximum output power of 60 mW and an efficiency of 80 % with respect to the Fabry-Perot laser diode in free-running condition are achieved. High stability of the laser system over many hours was also achieved with a fluctuation of less than 1 %.

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“…[1][2][3][4][5][6][7] The laser designs using distributed feedback (DFB) schemes and distributed Bragg reflectors (DBR) have been employed in the microcavity design for organic lasers. [8][9][10] These designs are particularly suitable for the thin-film lasers using polymeric semiconductors, where the Bragg gratings are essential for achieving the optical feedback in both schemes. An important motivation of these research activities is to find out a suitable approach to achieve electrically pumped lasing in organic semiconductors.…”

Section: Introductionmentioning

confidence: 99%