Research of the generation mode of an erbium fiber laser with distributed feedback

Moor I.D., Kulikov, A.V., Konnov, D.A., Konnov, K.A., Veremeenko I.A., Savin V.V.

For Russian citation (Opticheskii Zhurnal):

Моор Я.Д., Куликов А.В., Коннов Д.А., Коннов К.А., Веремеенко И.А., Савин В.В. Исследование режимов генерации эрбиевого волоконного лазера с распределенной обратной связью // Оптический журнал. 2025. Т. 92. № 3. С. 40–47. http://doi.org/10.17586/1023-5086-2025-92-03-40-47

Moor Ia.D., Kulikov A.V., Konnov D.A., Konnov K.A., Veremeenko I.A., Savin V.V. Research of the generation mode of an erbium fiber laser with distributed feedback [in Russian] // Opticheskii Zhurnal. 2025. V. 92. № 3. P. 40–47. http://doi.org/10.17586/1023-5086-2025-92-03-40-47

For citation (Journal of Optical Technology):

Abstract:

Subject of study. The parameters and optical characteristics of a distributed feedback laser based on a single fiber Bragg grating with a constant period induced in an erbium optical fiber. Aim of study. Dependences determination of the radiation generation mode of a distributed feedback laser based on a single fiber Bragg grating with a constant period, recorded using the phase mask method, on the pump power and the resonator length. Method. Fiber Bragg gratings were recorded by the phase mask method using optical beam translation of an eximer KrF-laser with a central wavelength of 248 nm. Structures with lengths from 40 to 70 mm (5 mm step) and reflection coefficients greater than 99% were recorded in FiberCore I-25(980/125) optical fiber subjected to low-temperature hydrogen treatment. A pump diode with a center wavelength of 980 nm and an output power of up to 435 mW was used in this work. During the study, the dependences of the generated radiation parameters on the variation of the fiber Bragg grating length and pump power were measured. Main results. It is established that for obtaining stable radiation generation at pump power up to 435 mW it is enough to use a single fiber Bragg grating with a constant period and length of 45 mm, recorded by the phase mask method in erbium fiber, without using structures with π-phase shift or gratings of longer length, recorded by the step-by-step method. Practical significance. The obtained results are applied to simplify optical schemes and optimize the operation of measurement systems based on fiber lasers with distributed feedback.

Keywords:

distributed feedback laser, fiber Bragg grating, laser generation mode, long fiber Bragg grating, erbium-doped optical fiber

OCIS codes: 140.3480, 140.3300, 230.5670, 260.7260

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