title: ÐÐ¾ÑÐ½ÑÐ¹ Ð²Ð¾Ð»Ð¾ÐºÐ¾Ð½Ð½ÑÐ¹ Ð¿Ð¸ÐºÐ¾ÑÐµÐºÑÐ½Ð´Ð½ÑÐ¹ Ð»Ð°Ð·ÐµÑ ÑÐ»ÑÑÑÐ°ÑÐ¸Ð¾Ð»ÐµÑÐ¾Ð²Ð¾Ð³Ð¾ ÑÐ¿ÐµÐºÑÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð´Ð¸Ð°Ð¿Ð°Ð·Ð¾Ð½Ð°
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Powerful picosecond fiber laser in the ultraviolet spectral range
Creators: name: ÐÐ¾Ð¼Ð°ÑÐ¾Ð²Ð°, ÐÐ»ÐµÐºÑÐ°Ð½Ð´ÑÐ°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: ÑÐ»ÑÑÑÐ°ÑÐ¸Ð¾Ð»ÐµÑ
Ð³ÐµÐ½ÐµÑÐ°ÑÐ¸Ñ Ð³Ð°ÑÐ¼Ð¾Ð½Ð¸Ðº
Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½ÑÐ¹ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ð¹ ÐºÑÐ¸ÑÑÐ°Ð»Ð» LBO
Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½ÑÐ¹ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ð¹ ÐºÑÐ¸ÑÑÐ°Ð»Ð» BBO
Ð²Ð¾Ð»Ð¾ÐºÐ¾Ð½Ð½ÑÐ¹ Ð»Ð°Ð·ÐµÑ
ultraviolet
harmonic generation
nonlinear optical LBO crystal
nonlinear optical BBO crystal
fiber laser

description: Ð¢ÐµÐ¼Ð° Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ: Â«ÐÐ¾ÑÐ½ÑÐ¹ Ð²Ð¾Ð»Ð¾ÐºÐ¾Ð½Ð½ÑÐ¹ Ð¿Ð¸ÐºÐ¾ÑÐµÐºÑÐ½Ð´Ð½ÑÐ¹ Ð»Ð°Ð·ÐµÑ ÑÐ»ÑÑÑÐ°ÑÐ¸Ð¾Ð»ÐµÑÐ¾Ð²Ð¾Ð³Ð¾ ÑÐ¿ÐµÐºÑÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð´Ð¸Ð°Ð¿Ð°Ð·Ð¾Ð½Ð°Â». Ð Ð°Ð±Ð¾ÑÐ° Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð° Ð² Ð»Ð°Ð±Ð¾ÑÐ°ÑÐ¾ÑÐ¸Ð¸ Â«ÐÐ°Ð·ÐµÑÐ½ÑÐµ Ð¸ Ð¿Ð»Ð°Ð·Ð¼ÐµÐ½Ð½ÑÐµ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸Â» ÐÐ¦ÐÐ£ Ð¦ÐÐ¢Ð Ð¡ÐÐ±ÐÐ£. Ð ÑÐ°Ð±Ð¾ÑÐµ Ð¸ÑÑÐ»ÐµÐ´ÑÐµÑÑÑ Ð¾Ð¿ÑÑÐ½ÑÐ¹ Ð¾Ð±ÑÐ°Ð·ÐµÑ Ð¼Ð¾ÑÐ½Ð¾Ð³Ð¾ ÑÐ»ÑÑÑÐ°ÑÐ¸Ð¾Ð»ÐµÑÐ¾Ð²Ð¾Ð³Ð¾ (Ð£Ð¤) Ð»Ð°Ð·ÐµÑÐ° Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð³ÐµÐ½ÐµÑÐ°ÑÐ¸Ð¸ ÑÑÐµÑÑÐµÐ¹ Ð³Ð°ÑÐ¼Ð¾Ð½Ð¸ÐºÐ¸ (ÐÐ¢Ð) Ð½Ð° ÐºÑÐ¸ÑÑÐ°Ð»Ð»Ðµ ÑÑÐ¸Ð±Ð¾ÑÐ°ÑÐ° Ð»Ð¸ÑÐ¸Ñ (LBO). Ð¢Ð°ÐºÐ¶Ðµ Ð±ÑÐ» ÑÐ¾Ð±ÑÐ°Ð½ Ð¼Ð°ÐºÐµÑ Ð»Ð°Ð·ÐµÑÐ° Ñ Ð´Ð»Ð¸Ð½Ð¾Ð¹ Ð²Ð¾Ð»Ð½Ñ 266 Ð½Ð¼, Ð³Ð´Ðµ ÑÐµÐ°Ð»Ð¸Ð·Ð¾Ð²ÑÐ²Ð°Ð»ÑÑ Ð¿ÑÐ¾ÑÐµÑÑ Ð³ÐµÐ½ÐµÑÐ°ÑÐ¸Ð¸ ÑÐµÑÐ²ÑÑÑÐ¾Ð¹ Ð³Ð°ÑÐ¼Ð¾Ð½Ð¸ÐºÐ¸ (ÐÐ§Ð) Ð² ÐºÑÐ¸ÑÑÐ°Ð»Ð»Ðµ Î²-Ð±Ð¾ÑÐ°ÑÐ° Ð±Ð°ÑÐ¸Ñ (BBO). Ð¦ÐµÐ»Ñ ÑÐ°Ð±Ð¾ÑÑ ÑÐ¾ÑÑÐ¾ÑÐ»Ð° Ð² ÑÑÑÐ¸ÑÐ¾Ð²ÐºÐµ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼ Ð±Ð»Ð¾ÐºÐ¾Ð² ÐÐ¢Ð Ð¸ ÐÐ§Ð Ð¸ Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ð¸ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸Ðº Ð£Ð¤ Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ Ñ Ð´Ð²ÑÐ¼Ñ Ð´Ð»Ð¸Ð½Ð°Ð¼Ð¸ Ð²Ð¾Ð»Ð½. Ð ÑÐ¾Ð´Ðµ ÑÐ°Ð±Ð¾ÑÑ ÑÐµÑÐ°Ð»Ð¸ÑÑ ÑÐ»ÐµÐ´ÑÑÑÐ¸Ðµ Ð·Ð°Ð´Ð°ÑÐ¸: Ð¸Ð·ÑÑÐµÐ½Ð¸Ðµ ÑÐµÐ¾ÑÐ¸Ð¸ Ð¿ÑÐ¾ÑÐµÑÑÐ¾Ð² ÐÐ¢Ð Ð¸ ÐÐ§Ð, Ð¾ÑÐ²Ð¾ÐµÐ½Ð¸Ðµ Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ¸ Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ð¹ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸Ðº Ð»Ð°Ð·ÐµÑÐ½Ð¾Ð³Ð¾ Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ, Ð¿Ð¾Ð´Ð±Ð¾Ñ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ¾Ð², Ð²ÑÐ¾Ð´ÑÑÐ¸Ñ Ð² ÑÐ¾ÑÑÐ°Ð² Ð±Ð»Ð¾ÐºÐ¾Ð² Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½Ð¾Ð³Ð¾ Ð¿ÑÐµÐ¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ñ, Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ðµ ÑÐ±Ð¾ÑÐºÐ¸ Ð¸ ÑÑÑÐ¸ÑÐ¾Ð²ÐºÐ¸ Ð¸Ñ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼, Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ðµ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸Ðº Ð£Ð¤ Ð»Ð°Ð·ÐµÑÐ° Ð¸ Ð°Ð½Ð°Ð»Ð¸Ð· Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÑ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð². ÐÑÐ»Ð¸ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ñ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ¸ Ð»Ð°Ð·ÐµÑÐ½Ð¾Ð³Ð¾ Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ Ñ Ð´Ð»Ð¸Ð½Ð°Ð¼Ð¸ Ð²Ð¾Ð»Ð½ 355 Ð½Ð¼ Ð¸ 266 Ð½Ð¼. Ð Ð¿ÐµÑÐ²Ð¾Ð¼ ÑÐ»ÑÑÐ°Ðµ ÑÑÐµÐ´Ð½ÑÑ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ°Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÑ Ð¿ÑÐµÐ²ÑÑÐ°Ð»Ð° 12 ÐÑ Ñ ÑÐ½ÐµÑÐ³Ð¸ÐµÐ¹ Ð² Ð¸Ð¼Ð¿ÑÐ»ÑÑÐµ Ð´Ð¾ 2,5 Ð¼ÐºÐÐ¶. Ð­ÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ ÐÐ¢Ð Ð¿ÑÐ¸ ÑÑÐ¾Ð¼ ÑÐ¾ÑÑÐ°Ð²Ð¸Ð»Ð° Ð±Ð¾Ð»ÐµÐµ 23 %. ÐÐ¾ Ð²ÑÐ¾ÑÐ¾Ð¼ ÑÐ»ÑÑÐ°Ðµ Ð±ÑÐ»Ð¾ Ð´Ð¾ÑÑÐ¸Ð³Ð½ÑÑÐ¾ 1,7 ÐÑ Ð£Ð¤ Ð¿ÑÐ¸ ÑÐ°ÑÑÐ¾ÑÐ°Ñ ÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¸Ð¼Ð¿ÑÐ»ÑÑÐ¾Ð² 2 Ð¸ 5 ÐÐÑ. ÐÐ°ÐºÑÐ¸Ð¼Ð°Ð»ÑÐ½Ð°Ñ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ ÐÐ§Ð 9,4% Ð½Ð°Ð±Ð»ÑÐ´Ð°Ð»Ð°ÑÑ Ð¿ÑÐ¸ ÑÐ°ÑÑÐ¾ÑÐµ 2 ÐÐÑ, ÑÐ½ÐµÑÐ³Ð¸Ñ Ð² Ð¸Ð¼Ð¿ÑÐ»ÑÑÐµ Ð²ÑÑÐ¾Ð´Ð½Ð¾Ð³Ð¾ Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ Ð¿ÑÐ¸ ÑÑÐ¾Ð¼ Ð±ÑÐ»Ð° ÑÐ°Ð²Ð½Ð¾Ð¹ 0,85 Ð¼ÐºÐÐ¶.
description: The theme of the final qualification work: Â«Powerful picosecond fiber laser in the ultraviolet spectral rangeÂ». The work was carried out at the laboratory of Â«Laser and Plasma TechnologiesÂ» SPbPU. A prototype of a high-power ultraviolet (UV) laser based on third harmonic generation (THG) on a lithium triborate (LBO) crystal is investigated. A model of a laser with a wavelength of 266 nm was also assembled, where the process of fourth harmonic generation (FGH) in a crystal of barium Î²-borate (BBO) was implemented. The purpose of the work was to align the optical systems of the THG unit and FHG unit and measure the characteristics of UV radiation with two wavelengths. In the course of the work, the following tasks were solved: studying the theory of THG and FHG processes, mastering the technique for measuring the characteristics of laser radiation, selecting optical elements that are part of the nonlinear conversion units, assembling and adjusting their optical systems, measuring the characteristics of a UV laser and analyzing the results. The characteristics of laser radiation with wavelengths of 355 nm and 266 nm are investigated. In the first case, the average optical power exceeded 12 W with pulse energy up to 2.5 Î¼J. More than 23% efficiency of THG was obtained. In the second case, 1.7 W UV was achieved at pulse repetition rates of 2 and 5 MHz. The maximum FHG efficiency of 9.4% was observed at a frequency of 2 MHz, the energy in the output radiation pulse was 0.85 Î¼J.