High-power continuous-wave single-frequency Er-doped fiber amplifiers at 1560 nm by in-band and core pumping of a 1480 nm Raman fiber laser are investigated in detail.Both co-and counter-pumping configurations are stu...High-power continuous-wave single-frequency Er-doped fiber amplifiers at 1560 nm by in-band and core pumping of a 1480 nm Raman fiber laser are investigated in detail.Both co-and counter-pumping configurations are studied experimentally.Up to 59.1 W output and 90%efficiency were obtained in the fundamental mode and linear polarization in the co-pumped case,while less power and efficiency were achieved in the counter-pumped setup for additional loss.The amplifier performs indistinguishably in terms of laser linewidth and relative intensity noise in the frequency range up to 10 MHz for both configurations.However,the spectral pedestal is raised in co-pumping,caused by cross-phase modulation between the pump and signal laser,which is observed and analyzed for the first time.Nevertheless,the spectral pedestal is 34.9 dB below the peak,which has a negligible effect for most applications.展开更多
We present a fully automated laser system with low-intensity noise for coherent Raman scattering microscopy.The robust two-color system is pumped by a solid-state oscillator,which provides Stokes pulses fixed at 1043 ...We present a fully automated laser system with low-intensity noise for coherent Raman scattering microscopy.The robust two-color system is pumped by a solid-state oscillator,which provides Stokes pulses fixed at 1043 nm.The tunable pump pulses of 750 to 950 nm are generated by a frequency-doubled fiberfeedback femtosecond optical parametric oscillator.The resulting pulse duration of 1.2 ps provides a viable compromise between optimal coherent Raman scattering signal and the necessary spectral resolution.Thus a spectral range of 1015 to 3695 cm−1 with spectral resolution of<13 cm−1 can be addressed.展开更多
基金supported by the National Key R&D Program of China(Nos.2020YFB1805900 and 2020YFB0408300)the National Natural Science Foundation of China(No.62075226)
文摘High-power continuous-wave single-frequency Er-doped fiber amplifiers at 1560 nm by in-band and core pumping of a 1480 nm Raman fiber laser are investigated in detail.Both co-and counter-pumping configurations are studied experimentally.Up to 59.1 W output and 90%efficiency were obtained in the fundamental mode and linear polarization in the co-pumped case,while less power and efficiency were achieved in the counter-pumped setup for additional loss.The amplifier performs indistinguishably in terms of laser linewidth and relative intensity noise in the frequency range up to 10 MHz for both configurations.However,the spectral pedestal is raised in co-pumping,caused by cross-phase modulation between the pump and signal laser,which is observed and analyzed for the first time.Nevertheless,the spectral pedestal is 34.9 dB below the peak,which has a negligible effect for most applications.
基金the ERC Advanced Grant(COMPLEXPLAS)DFG(Nos.SPP1391,SPP 1839,FOR730,and GI 269/11-1)+4 种基金the Bundesministerium für Bildung und Forschung(Nos.13N9048,13N10146,and PRINTOPTICS),the Carl Zeiss Foundationthe Baden-Württemberg Stiftung(Spitzenforschung II)the University of Stuttgart(open access fund)the EPSRC(No.EP/P001114/1)the SRPe PRER and PECRE Award 2017/18.
文摘We present a fully automated laser system with low-intensity noise for coherent Raman scattering microscopy.The robust two-color system is pumped by a solid-state oscillator,which provides Stokes pulses fixed at 1043 nm.The tunable pump pulses of 750 to 950 nm are generated by a frequency-doubled fiberfeedback femtosecond optical parametric oscillator.The resulting pulse duration of 1.2 ps provides a viable compromise between optimal coherent Raman scattering signal and the necessary spectral resolution.Thus a spectral range of 1015 to 3695 cm−1 with spectral resolution of<13 cm−1 can be addressed.
