Fiber laser is a fundamental component of laser systems and is of great significance for development of laser technology.Its pulse output can be divided into Q-switched and mode-locked.Achieving ultrashort pulse with ...Fiber laser is a fundamental component of laser systems and is of great significance for development of laser technology.Its pulse output can be divided into Q-switched and mode-locked.Achieving ultrashort pulse with narrower pulse duration and higher power is the focus of current research on mode-locked lasers.As an important component of fiber laser systems,saturable absorber(SA) can modulate losses in the optical cavity and generate pulses,enabling the laser system to achieve pulse output under long-term normal operating conditions better.Therefore,expanding the selection range of materials with better saturable absorption properties to improve the quality of pulse output is an important topic in current research.Here,the second generation topological insulator Bi_(2)Te_(3) single crystal is prepared,and a ring fiber laser system is built with the Bi_(2)Te_(3) SA.The mode-locked pulse with a pulse duration of 288 fs and a signal-to-noise ratio of 80.202 dB is realized.This result verifies that Bi_(2)Te_(3),as a member of topological insulator,has good saturable absorption characteristics,and has broad prospects for the application research in lasers.展开更多
Topological insulator materials,including Bi_(2)Te_(3),Sb_(2)Te_(3),Sb_(2)Te_(3),and Bi_(2)Se_(3),have attracted some attention due to their narrow band gaps,high carrier mobility,wide spectral absorption ranges and o...Topological insulator materials,including Bi_(2)Te_(3),Sb_(2)Te_(3),Sb_(2)Te_(3),and Bi_(2)Se_(3),have attracted some attention due to their narrow band gaps,high carrier mobility,wide spectral absorption ranges and other characteristics.We report a new multi-compound topological insulator material BiSbTeSe_(2) that,compared with the traditional topological insulator composed of two elements,can integrate the physical advantages of each element,helpful to build an experimental platform with rich physical properties.The nonlinear optical characteristics of the quaternary material BiSbTeSe_(2) is obtained in the erbium-doped fiber laser.Using the BiSbTeSe_(2) as a saturable absorber material,the passive Q-switched and mode-locked fiber lasers are achieved.The pulse duration and signal-to-noise ratio(SNR)of the Q-switched fiber laser are 854 ns and 70 dB,respectively.Meanwhile,the pulse duration and SNR of the mode-locked fiber laser are 259 fs and 87.75 dB,respectively.This work proves that the BiSbTeSe_(2) has a considerable application prospect as a saturable absorber in fiber lasers,and provides a new reference for selection of high-performance saturable absorber materials.展开更多
Fiber lasers with different net dispersion cavity values can produce some types of solitons,and rich nonlinear dynamics phenomena can be achieved by selecting different saturable absorbers.A new layered high-entropy v...Fiber lasers with different net dispersion cavity values can produce some types of solitons,and rich nonlinear dynamics phenomena can be achieved by selecting different saturable absorbers.A new layered high-entropy van der Waals material(HEX)(Mn,Fe,Co,Ni)PS_(3)was selected as a saturable absorber to achieve a high-power laser output of 34 m W.In addition,the wavelength can be dynamically tuned from 1560 nm to 1531 nm with significant dual-wavelength phenomena at 460 fs pulse duration.展开更多
基金supported by the National Key Research and Development Program of China(Grant No.2022YFB4601101)the Beijing Natural Science Foundation(Grant No.JQ21019)the National Natural Science Foundation of China(Grant Nos.11975001,12075034,and 12261131495)。
文摘Fiber laser is a fundamental component of laser systems and is of great significance for development of laser technology.Its pulse output can be divided into Q-switched and mode-locked.Achieving ultrashort pulse with narrower pulse duration and higher power is the focus of current research on mode-locked lasers.As an important component of fiber laser systems,saturable absorber(SA) can modulate losses in the optical cavity and generate pulses,enabling the laser system to achieve pulse output under long-term normal operating conditions better.Therefore,expanding the selection range of materials with better saturable absorption properties to improve the quality of pulse output is an important topic in current research.Here,the second generation topological insulator Bi_(2)Te_(3) single crystal is prepared,and a ring fiber laser system is built with the Bi_(2)Te_(3) SA.The mode-locked pulse with a pulse duration of 288 fs and a signal-to-noise ratio of 80.202 dB is realized.This result verifies that Bi_(2)Te_(3),as a member of topological insulator,has good saturable absorption characteristics,and has broad prospects for the application research in lasers.
基金the Beijing Natural Science Foundation(Grant No.JQ21019)the National Natural Science Foundation of China(Grant Nos.12075034 and 11974003)。
文摘Topological insulator materials,including Bi_(2)Te_(3),Sb_(2)Te_(3),Sb_(2)Te_(3),and Bi_(2)Se_(3),have attracted some attention due to their narrow band gaps,high carrier mobility,wide spectral absorption ranges and other characteristics.We report a new multi-compound topological insulator material BiSbTeSe_(2) that,compared with the traditional topological insulator composed of two elements,can integrate the physical advantages of each element,helpful to build an experimental platform with rich physical properties.The nonlinear optical characteristics of the quaternary material BiSbTeSe_(2) is obtained in the erbium-doped fiber laser.Using the BiSbTeSe_(2) as a saturable absorber material,the passive Q-switched and mode-locked fiber lasers are achieved.The pulse duration and signal-to-noise ratio(SNR)of the Q-switched fiber laser are 854 ns and 70 dB,respectively.Meanwhile,the pulse duration and SNR of the mode-locked fiber laser are 259 fs and 87.75 dB,respectively.This work proves that the BiSbTeSe_(2) has a considerable application prospect as a saturable absorber in fiber lasers,and provides a new reference for selection of high-performance saturable absorber materials.
文摘Fiber lasers with different net dispersion cavity values can produce some types of solitons,and rich nonlinear dynamics phenomena can be achieved by selecting different saturable absorbers.A new layered high-entropy van der Waals material(HEX)(Mn,Fe,Co,Ni)PS_(3)was selected as a saturable absorber to achieve a high-power laser output of 34 m W.In addition,the wavelength can be dynamically tuned from 1560 nm to 1531 nm with significant dual-wavelength phenomena at 460 fs pulse duration.
