Zolotarev V. V. 1, Leshko A. Yu. 1, Malets V. N. 1, Slipchenko S. O. 1, Pikhtin N. A.1
1Ioffe Institute, St. Petersburg, Russia
Email: Zolotarev.bazil@mail.ioffe.ru
Multimode semiconductor lasers with surface distributed feedback (DFB) emitting at a wavelength of 1040 nm have been developed. The DFB period is 20 μm. This design allows one to abandon the complex technological processes of two-stage epitaxy and electron lithography. For laser samples with antireflection coatings on both mirrors, a narrowing of the lasing spectrum to two competing modes located on both sides of the Bragg wavelength has been demonstrated. Its temperature stability was less than 0.1 nm/K. The presence of competing Fabry-Perot modes indicates an insufficient value of the coupling coefficient for the samples. Keywords: Semiconductor laser, distributed feedback, lasing spectrum, laser resonator.
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