Font Size: a A A

Study On Pulse Lasers Of 2?m/1.3?m Based On Black Phosphorus/Nanometer Materials

Posted on:2018-07-01Degree:MasterType:Thesis
Country:ChinaCandidate:Z Z ChuFull Text:PDF
GTID:2348330518968074Subject:Physics
Abstract/Summary:PDF Full Text Request
Diode pumped solid-state laser become the fastest development in recent years because of its long working time,low power consumption,small volume and easy to save.Diode pumped all solid state pulsed laser has a wide range of applications in material processing,military,medical,communications and other fields due to its high output power,narrow pulse width and high beam quality etc.Traditionally,the method for obtaining pulsed laser is passively Q-switched laser or passively mode-locked laser based on saturable absorption materials.Therefore,the research on the new type of saturable absorption materials determines the development of pulsed laser technology to a great extent.In this paper,by using the black phosphorus(BP)and argentum nanorods(ANRs)as saturable absorbers(SAs),passively Q-switched solid-state lasers at the central wavelength of 1988 nm were demonstrated.We also demonstrated passively Q-switched solid-state lasers operating at the central wavelength of 1342 nm based on gold nanobipyramids(Au-NBPs)and black phosphorus for the first time.The advantages and disadvantages of these several saturable absorbing materials and the characteristics of output pulse laser are detailed analyzed.The main contents are as follows:1.The technical principle of passive Q-switched and passive mode-locking was introduced in detail.We give a brief talk about the advantages and disadvantages of the new material,such as BP and nano material and the present research progress of nanometer materials and BP.2.Few-layred black phosphorus(BP)was successfully fabricated by liquid phase exfoliation(LPE)method.By using the BP saturable absorber(SA),a passively Q-switched solid-state laser at the central wavelength of 1988 nm was demonstrated.Under an absorbed diode-pumped power of 3.38 W,an average power of 151 m W was generated with minimum pulse width of 1.78?s and repetition rate of 19.25 k Hz,corresponding to a pulse energy of 7.84?J.Our experimental results showed that BP could be used as an excellent SA for achieving mid-infrared solid-state pulsed lasers.To the best of our knowledge,it was the first time to obtain a solid-state Q-switched laser of 2?m based on BP-SA.3.Argentum nanorods(ANRs)were successfully prepared and employed as a saturable absorber for demonstrating a 2?m passively Q-switched laser within a compact linear cavity.At the pump power was 5.73 W,the maximum output power,maximum repetition rate and the minimum pulsewidth were 118 m W,24.32 k Hz and 1.455?s,respectively.4.A passively Q-switched solid-state laser at the central wavelength of 1342 nm was demonstrated based on BP SA.Under an absorbed diode-pumped power of 4.72 W,an average power of 107 m W was generated with minimum pulse width of 755 ns and repetition rate of 74.78 k Hz5.We demonstrate a passively Q-switched solid-state laser operating at the central wavelength of 1342 nm based on gold nanobipyramids(Au-NBPs)as saturable absorber(SA)for the first time.Au-NBPs are fabricated through a seed-mediated growth method,and placed in a simple linear cavity.Under an absorbed diode-pumped power of 5.339 W,an average power of 175 m W was generated with a minimum pulse width of 342 ns and a repetition rate of141.8 k Hz,corresponding to a pulse energy of 1.23 ?J.
Keywords/Search Tags:LD-pump, black phosphorus(BP), argentum nanorods(ANRs), gold nanobipyramids(Au-NBPs), passively Q-switched and Q-switched mode-locked
PDF Full Text Request
Related items