排序方式: 共有18条查询结果,搜索用时 15 毫秒
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Karpov VI Dianov EM Paramonov VM Medvedkov OI Bubnov MM Semyonov SL Vasiliev SA Protopopov VN Egorova ON Hopin VF Guryanov AN Bachynski MP Clements WR 《Optics letters》1999,24(13):887-889
An all-fiber 1.48-mum generator based on a laser-diode-pumped Yb-doped double-clad laser and a cascaded Raman wavelength converter has been developed. Second-order Raman Stokes radiation was generated in a phosphosilicate-fiber resonator formed by two pairs of Bragg gratings. A slope efficiency of the Raman converter of 48% with respect to the power emitted by the double-clad Yb laser has been achieved. We obtained an output power of 1 W at a slope efficiency of 34% with respect to the laser-diode array power, with a total optical-to-optical efficiency of 23%. 相似文献
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Chumaevskii A. V. Zykova A. P. Gusarova A. V. Guryanov D. A. Rubtsov V. E. Kolubaev E. A. 《Russian Physics Journal》2022,65(2):303-311
Russian Physics Journal - The results of model experimental studies of structural-phase changes in an AA2024 aluminum alloy after friction with a counter-body of a complex configuration are... 相似文献
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DA Gaponov LV Kotov ME Likhachev MM Bubnov A Cabasse JL Oudar S Fevrier DS Lipatov NN Vechkanov AN Guryanov G Martel 《Optics letters》2012,37(15):3186-3188
Direct amplification of output from chirped pulse oscillator (CPO) to 3.3?W of average power (pulse energy of 118?nJ in 20?ps pulse duration before compression) was achieved in a properly designed cladding pumped large mode area Er-doped fiber. Various configurations of CPO cavity with different FWHM of output spectrum and pulse duration were investigated. Fourier limit compression with 480?fs pulse duration and 32?kW peak power has been obtained for pulses with 14.8?nm FWHM spectrum. Subsequent nonlinear compression in a standard SMF-28 fiber yielded pulses as short as 145?fs. 相似文献
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V. B. Neustruev E. M. Dianov V. M. Kim V. M. Mashinsky M. V. Romonov A. N. Guryanov V. F. Khopin V. A. Tikhomirov 《Fiber and Integrated Optics》1989,8(2):143-156
Induced optical losses and paramagnetic Ge(n) centers were investigated in germanium-doped silica glass and optical fibers after γ and ultraviolet (UV) irradiation. It was found that both types of irradiation created similar effects. By means of selective UV irradiation, Ge (1 and 3) centers were identified in optical absorption spectra, presumably as induced bands centered at 4.4 eV and 6.2 eV, respectively. Moreover, photobleaching of Ge(1) centers took place under 266-nm wavelength excitation. In optical fibers no difference was observed between γ- and UV-induced loss spectra in the wavelength range from 480 nm to 1,900 nm. Partial reversibility of the photocoloration was observed. For comparison, the coloration effects were studied in glass prepared by means of modified chemical vapor deposition (MCVD) vapor-phase axial deposition (VAD), and plasma-activated chemical vapor deposition (PCVD) techniques. 相似文献
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Mashinsky VM Neustruev VB Dvoyrin VV Vasiliev SA Medvedkov OI Bufetov IA Shubin AV Dianov EM Guryanov AN Khopin VF Salgansky MY 《Optics letters》2004,29(22):2596-2598
Germania-glass-core silica-glass-cladding single-mode fibers (deltan as great as 0.143) with a minimum loss of 20 dB/km at 1.85 microm were fabricated by modified chemical-vapor deposition. The fibers exhibit strong photorefractivity, with type IIa index modulation of 2 x 10(-3). A Raman gain of 300 dB/(kmW) was determined at 1.12 microm. Only 3 m of such fibers is sufficient for constructing the 10-W Raman laser at 1.12 microm with a 13-W pump at 1.07 microm. 相似文献
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Aleshkina SS Likhachev ME Pryamikov AD Gaponov DA Denisov AN Bubnov MM Salganskii MY Laptev AY Guryanov AN Uspenskii YA Popov NL Février S 《Optics letters》2011,36(18):3566-3568
A design of a polarizing all-glass Bragg fiber with a microstructure core has been proposed for the first time. This design provides suppression of high-order modes and of one of the polarization states of the fundamental mode. The polarizing fiber was fabricated by a new, simple method based on a combination of the modified chemical vapor deposition (MCVD) process and the rod-in-tube technique. The mode field area has been found to be about 870 μm2 near λ=1064 nm. The polarization extinction ratio better than 13 dB has been observed over a 33% wavelength range (from 1 to 1.4 μm) after propagation in a 1.7 m fiber piece bent to a radius of 70 cm. 相似文献
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Bufetov IA Firstov SV Khopin VF Medvedkov OI Guryanov AN Dianov EM 《Optics letters》2008,33(19):2227-2229
Bismuth-doped fiber lasers operating in the range 1300-1470 nm have been demonstrated for the first time, to our knowledge. It has been shown that Bi-doped alumina-free phosphogermanosilicate fibers reveal optical gain in a wavelength range of 1240-1485 nm with pumping at 1205, 1230, or 808 nm. 相似文献
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L. I. Bulatov V. V. Dvoyrin V. M. Mashinsky E. M. Dianov A. P. Suhorukov A. A. Umnikov A. N. Guryanov 《Bulletin of the Russian Academy of Sciences: Physics》2008,72(1):98-102
The optical-loss spectra of bismuth-doped aluminosilicate glass core optical fibers have been investigated in the spectral range 200–1700 nm. Absorption (active and inactive) and scattering losses have been separated. The optical fibers under study were fabricated by methods of modified chemical vapor deposition and surface-plasma chemical vapor deposition. 相似文献
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Melkumov MA Bufetov IA Shubin AV Firstov SV Khopin VF Guryanov AN Dianov EM 《Optics letters》2011,36(13):2408-2410
A 24 dB gain bismuth-doped fiber amplifier at 1430 nm pumped by a 65 mW commercial laser diode at 1310 nm is reported for the first time (to our knowledge). A 3 dB bandwidth of about 40 nm, a noise figure of 6 dB, and a power conversion efficiency of about 60% are demonstrated. The temperature behavior of the gain spectrum is examined. 相似文献