Distributed-feedback grating used as an array-mode selector in resonant antiguided diode laser arrays: effects of the mirror facet position with respect to the grating
| العنوان: | Distributed-feedback grating used as an array-mode selector in resonant antiguided diode laser arrays: effects of the mirror facet position with respect to the grating |
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| المؤلفون: | J. Buus, Luke J. Mawst, Dan Botez, M. Nesnidal |
| المصدر: | IEEE Photonics Technology Letters. 10:507-509 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 1998. |
| سنة النشر: | 1998 |
| مصطلحات موضوعية: | Physics, Diffraction, Facet (geometry), business.industry, Phase (waves), Grating, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Gallium arsenide, law.invention, chemistry.chemical_compound, Optics, chemistry, law, Optoelectronics, Electrical and Electronic Engineering, business, Current density, Diode |
| الوصف: | In resonant and nearly resonant antiguided arrays (ROW arrays), if the grating is located below the active region, a distributed-feedback (DFB) grating can function as a selector for the in-phase array mode in addition to its role as a frequency discriminator. Threshold current densities are calculated for competing (lateral) spatial modes in AR/HR coated 10- and 20-element arrays incorporating lower gratings (ROW-LDFB arrays). Calculations include the effects of random facet locations relative to the grating phase. The threshold current density, J/sub th/, of the in-phase mode and its discrimination, /spl Delta/J/sub th/, against other (array) spatial modes vary with facet location. For 20 (10) elements, J/sub th//spl ap/350-525 (400-550) A/cm/sup 2/ and /spl Delta/J/sub th/ reaches a maximum of 55 (58) A/cm/sup 2/ for 0.01/0.95 AR/HR-coated 350 /spl mu/m-long devices. For 10-element arrays, the probability of in-phase operation is approximately 50%; for 20-element arrays, the probability is 100%. Preliminary experimental results from 20-element nonresonant devices with uncoated facets are near diffraction-limited beams and nearly single-frequency operation to 250 mW. |
| تدمد: | 1941-0174 1041-1135 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::e436ef55ce1d1bf54acde4361d1548dc https://doi.org/10.1109/68.662576 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........e436ef55ce1d1bf54acde4361d1548dc |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19410174 10411135 |
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