Infrared and Laser Engineering, Volume. 50, Issue 8, 20210368(2021)
Longwave mid-IR femtosecond pulse sources driven by ultrafast fiber lasers (Invited)
Figures & Tables(13)
Fig. 2. Schematic diagram of a system for generating mid-IR pulses based on inter-pulse DFG
Fig. 4. Effects of (a)
Fig. 5. (a) Group velocity mismatch in 1.03 and 2 µm driven DFG and (b), (c) 2 µm driven DFG in 4 mm GaSe
Fig. 6. Effects of (a)
Fig. 7. Principle of SESS. (a) After passing the 6 cm fiber, femtosecond pulses could be generated by filtering out the leftmost and rightmost sidelobes of the spectrum; (b) Evolution of pulse spectrum with fiber length
Fig. 10. State-of-the-art long wave mid-IR fiber laser sources based on inter-pulse DFG
Fig. 11. (a) Measured pulse energy(blue dotted curve) and duration(black dotted curve) for the pulses resulting from the filtered spectral lobes at 1.1-1.2 μm. (b) Measured spectra and average power for mid-IR pulses generated in 2 mm GaSe
Table 1. Several of the most widely used or most promising new mid-IR non-oxide crystals
View tableView in ArticleTable 1. Several of the most widely used or most promising new mid-IR non-oxide crystals
Mid-IR non-oxide nonlinear crystals Transparency range/μm deff /pm·V−1 AgGaS2(AGS) 0.5-13 23 AgGaSe2 (AGSe) 0.7-18 41 ZnGeP2(ZGP) 2.0-11 75 CdSiP2(CSP) 0.7-9 85 GaSe 0.7-18 54 HgGa2S4(HGS) 0.5-13 31 LilnS2(LIS) 0.4-12 16 LilnSe2 (LISe) 0.5-12 10 LiGaS2(LGS) 0.3-11 10 LiGaSe2(LGSe) 0.4-13 18
Table 2. Summary of ultrafast fiber laser driven DFG to obtain long-wave mid-IR light source
View tableView in ArticleTable 2. Summary of ultrafast fiber laser driven DFG to obtain long-wave mid-IR light source
Method1 Signal Pump NLCs Mid-IR Photon efficiency2 Ref. 1. Method：信号脉冲产生方法， 2. Photon efficiency：Ei×ωi/(Ep×ωp ) SC 1.105 μm 50 MHz, 200 mW, 200 fs 1.038 μm GaSe 400 μW @ 17.5 μm 3.4% [ 32 ]43-58 mW 1.250-1.285 μm 40 MHz, 320 fs 330-480 mW 1.02-1.04 μm AgGaS2 3 mW @ 5.5 μm 3.4% [ 33 ]1.103-1.109 μm 80 mW @ 1.103 μm 50 MHz 1350 mW @ 1.04 μm 1.038-1.046 μm GaSe 16-20 μm 1.5 mW @ 18 μm 1.9% [ 34 ]40-50 mW, 1.24-1.26 μm 40 MHz, 300 mW 0.97-1.092 μm (SPM) AgGaS2 0.64 mW @ 4.5 μm 4.2-9 μm 1.0% [ 35 ]300 mW, 2.03 μm 130 fs 100 MHz, 350 mW, 72 fs 1.55 μm CdSiP2(CSP) 15 mW, 6.5 μm (2.3 optical cycles, 5.5-8 μm) 18.0% [ 36 ]0.6 W, 60 fs 1.8-1.96 μm 93.4 MHz, 1.6 W, 110 fs 1.55 μm OP-GaP 69 mW @ 7.4 μm 6-11 μm 20.6% [ 37 ]SSFS 1.103 μm 50 MHz, 200 mW, 200 fs 1.038 μm GaSe 20 μW @ 18 μm 0.2% [ 38 ]<100 mW, 340 fs, 1.6-1.865 μm 37 MHz, 300 mW, 640 fs 1.55 μm GaSe & AgGaSe 2 up to 1.5 μW, 9.7-14.9 μm 0.0031% [ 39 ]30 mW @ 2.5 μm 72 MHz, 145 fs 430 mW @ 1.95 μm OP-GaAs 1.3 mW 6.7-12.7 μm 3.4% [ 40 ]5-25 mW 1.15-1.65 μm 151 MHz, <80 fs 1.4-1.9 W @ 1.055 μm GaSe up to 1.5 mW @ 4.7 μm 3-10 μm 0.5% [ 41 ]100-250 mW, 84 fs 1.76-1.93 μm 250 MHz, 550 mW, 50 fs 1.55 μm GaSe 4 mW @ 7.8 μm 8-14 μm 3.7% [ 42 ]150-235 mW, 80 fs 1.93 μm 48 MHz, 175 mW, 65 fs 1.56 μm OP-GaP 7.4 mW @ 7.5 μm 6-9 μm 20.3% [ 43 ]300 mW, 80 fs 1.965 μm 125.07 MHz,200 mW 65 fs 1.56 μm OP-GaP 5 mW @ 7.7 μm 6-9 μm 12.3% [ 44 ]SESS <600 mW,120 fs 1.1-1.2 μm 30 MHz, <6 W, 165 fs 1.03 μm GaSe 5.4 mW @ 9.5 μm 7-18 μm 0.8% [ 17 ]
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Yang Liu, Qian Cao, Xincai Diao, Zhiyi Wei, Guoqing Chang. Longwave mid-IR femtosecond pulse sources driven by ultrafast fiber lasers (Invited)[J]. Infrared and Laser Engineering, 2021, 50(8): 20210368
Paper Information
Category: Special issue—ultrafast and ultraintense mid-infrared laser technology
Received: Jun. 3, 2021
Accepted: --
Published Online: Nov. 2, 2021
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