Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2021. №9
ContentsFull text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2021.9.9
UDC: 621.396.029.7
Bipolarized Raman amplification for lidar transmitter
V. I. Grigorievsky, Ya. A. Tezadov
Fryazino Branch of the Kotelnikov Institute of Radio Engineering and Electronics RAS, 141190, Fryazino, pl. ac. Vvedenskogo, 1
The paper was received September 3, 2021
Abstract. A comparison is made of the spectral distortions of the output radiation of a Raman amplifier in the case of one and two-polarization amplification of modulated radiation in an extended optical fiber. With an output power of 3.5 W at a wavelength of 1649 nm, the spectral distortions for bipolarization amplification are lower, which makes it possible to increase the amplifier output power to ~ 4 W, and the level of spectral distortions at the amplifier output makes possible to carry out lidar measurements of methane concentration by a remote method with high accuracy. Simulation of bipolarization Raman amplification was carried out along with experimental verification. For this simulation, the coefficient of depolarization of radiation propagating in an extended single-mode fiber was introduced. The experimental results and the results of theoretical modeling are in good agreement. An increase in the amplifier power also makes it possible to increase the methane sensing range in an open atmosphere with lidars using Raman amplifiers as transmitters.
Key words: lidar, raman amplifier, polarization, pumping, methane.
1. Akimova G.A., Grigor’yevskii V.I., Mataibaev V.V. Enhancement of the energy potential of a lidar for methane detection with the use of a quasi_continuous radiation source. Journal of Communications Technology and Electronics. 2015. V.60. №10. PP.1058-1061. http://doi.org/10.1134/S1064226915100022
2. Crotti C., Deloison F., Alahyane F., et al. Wavelength optimization in femtosecond laser corneal surgery. Investigative Ophthalmology & Visual Science. 2013. V.54. №5. P.3340-3349. http://dx.doi.org/10.1167/iovs.12-10694
3. Horton N.G., Wang K., Kobat D., et al. In vivo three-photon microscopy of subcortical structures within an intact mouse brain. Nature Photonics. 2013. V.7. №3. P.205-209. http://dx.doi.org/10.1038/nphoton.2012.336
4. Sharma U., Chang E.W., Yun S.H. Long-wavelength optical coherence tomography at 1.7 μm for enhanced imaging depth. Optics Express. 2008. V.16. №24. P.19712-19723. http://dx.doi.org/10.1364/OE.16.019712
5. Cadroas P., Abdeladim L., Kotov L., et al. All-fiber femtosecond laser providing 9 nJ, 50 MHz pulses at 1650 nm for three-photon microscopy. Journal of Optics. 2017. V.19. №6. P.065506-065511. http://dx.doi.org/10.1088/2040-8986/aa6f72
6. Chen S., Jung Y., Alam S., et al. Ultra-short wavelength operation of thulium-doped fiber amplifiers and lasers. Optics Express. 2019. V.27. №25. P.369322-369331. http://dx.doi.org/10.1364/OE.27.036699
7. Delahaye T., Maxwell S.E., Reed Z.D., et al. Precise methane absorption measurements in the 1.64 μm spectral region for the MERLIN mission. Journal of Geophysical Research Atmospheres. 2016. V.121. №12. P.7360-7370. http://dx.doi.org/10.1002/2016JD025024
8. Grigorievsky V.I., Tezadov Y.A., Elbakidze A.V. Modeling and investigation of high-power fiber-optical transmitters for lidar applications. Journal of Russian Laser Research. 2017. V.38. №4. P.311-315. https://doi.org/10.1007/s10946-017-9651-7
9. Agraval G. Nelineynaya volokonnaya optika [Nonlinear fiber optics]. Moscow. Mir. 2009. 639 p.
For citation:
Grigorievsky V.I., Tezadov Ya.A. Bipolarized Raman amplification for lidar transmitter. Zhurnal Radioelektroniki [Journal of Radio Electronics] [online]. https://doi.org/10.30898/1684-1719.2021.9.9