Tarasov, AA Chu, H Jhon, YM 2024-01-21T10:32:18Z 2024-01-21T10:32:18Z 2021-09-01 2002-07 1041-1135 https://pubs.kist.re.kr/handle/201004/139425 A new polarization-independent tunable spectral filter based on the combination of a single isotropic acoustooptic cell and a pair of conventional diffraction gratings is suggested and investigated. The filter features narrow bandwidth, frequency shift compensation, and low polarization dependence. Using standard AMTIR-1 chalcogenide glass acoustooptic modulator with frequency 40-77 MHz and ruled diffraction gratings with 600 grooves/mm, a 3-dB bandwidth of 1.1 mn, and a tuning range of 16 nm were obtained. Tuning range can be increased by the use of acoustooptic cell with increased center frequency or diffraction grating of a lower dispersion. Inserting the filter inside a laser cavity, continuous-wave tunable generation of Er-doped fiber laser with maximum output power 3 mW was realized. When a Fabry-Wrot etalon (0.166-nm free spectral range, 40% reflectance) was inserted into laser cavity, the linewidth was observed to be less than 0.05 nm. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC TUNABLE FILTERS LASER Polarization-independent acoustooptically tuned spectral filter with frequency shift compensation Article 10.1109/LPT.2002.1012393 1 IEEE PHOTONICS TECHNOLOGY LETTERS, v.14, no.7, pp.944 - 946 IEEE PHOTONICS TECHNOLOGY LETTERS 14 7 944 946 scie scopus 000176339500020 2-s2.0-0036648287 Engineering, Electrical & Electronic Optics Physics, Applied Engineering Optics Physics Article TUNABLE FILTERS LASER acoustooptic devices acoustooptic tunable filters laser tuning low polarization dependence narrow bandwidth tunable filters