[1] Birks T A, Knight J C. Russell P St J. Endlessly single-mode photonic crystal fiber[J]. Optics Letters, 22, 961-963(1997).

[2] Knight J C, Birks T A, Cregan R F et al. Large mode area photonic crystal fibre[J]. Electronics Letters, 34, 1347-1348(1998).

[3] Mogilevtsev D, Birks T A, Russell P S. Group-velocity dispersion in photonic crystal fibers[J]. Optics Letters, 23, 1662-1664(1998).

[4] Bouwmans G, Luan F, Knight J et al. Properties of a hollow-core photonic bandgap fiber at 850 nm wavelength[J]. Optics Express, 11, 1613-1620(2003).

[5] Lee J H, Yusoff Z, Belardi W et al. Investigation of Brillouin effects in small-core holey optical fiber: lasing and scattering[J]. Optics Letters, 27, 927-929(2002).

[6] Shephard J D. Jones J D C, Hand D P, et al. High energy nanosecond laser pulses delivered single-mode through hollow-core PBG fibers[J]. Optics Express, 12, 717-723(2004).

[7] Ortigosa-Blanch A, Knight J C, Wadsworth W J et al. Highly birefringent photonic crystal fibers[J]. Optics Letters, 25, 1325-1327(2000).

[8] Jones D C, Bennett C R, Smith M A et al. High-power beam transport through a hollow-core photonic bandgap fiber[J]. Optics Letters, 39, 3122-3125(2014).

[9] Wang M, Wang F, Yu C L et al. Ultra-low core numerical aperture large mode area photonic crystal fiber with 1 MW peak power output[J]. Acta Optica Sinica, 39, 0536001(2019).

[10] Ouzounov D G, Ahmad F R, Müller D et al. Generation of megawatt optical solitons in hollow-core photonic band-gap fibers[J]. Science, 301, 1702-1704(2003).

[11] Benabid F, Knight J C, Antonopoulos G et al. Stimulated Raman scattering in hydrogen-filled hollow-core photonic crystal fiber[J]. Science, 298, 399-402(2002).

[12] Benabid F, Bouwmans G, Knight J C et al. Ultrahigh efficiency laser wavelength conversion in a gas-filled hollow core photonic crystal fiber by pure stimulated rotational Raman scattering in molecular hydrogen[J]. Physical Review Letters, 93, 123903(2004).

[13] Londero P, Venkataraman V, Bhagwat A R et al. Ultralow-power four-wave mixing with Rb in a hollow-core photonic band-gap fiber[J]. Physical Review Letters, 103, 043602(2009).

[14] Perrella C, Light P S, Anstie J D et al. High-efficiency cross-phase modulation in a gas-filled waveguide[J]. Physical Review A, 88, 013819(2013).

[15] Venkataraman V, Saha K, Gaeta A L. Phase modulation at the few-photon level for weak-nonlinearity-based quantum computing[J]. Nature Photonics, 7, 138-141(2013).

[16] Henningsen J, Hald J, Peterson J C. Saturated absorption in acetylene and hydrogen cyanide in hollow-core photonic bandgap fibers[J]. Optics Express, 13, 10475-10482(2005).

[17] Slepkov A D, Bhagwat A R, Venkataraman V et al. Spectroscopy of Rb atoms in hollow-core fibers[J]. Physical Review A, 81, 053825(2010).

[18] Wu Y J, Ye H Q, Han J et al. Tapered photonic crystal fiber spectral broadening degradation influenced by 520 nm pump[J]. Acta Optica Sinica, 39, 1106006(2019).

[19] Ritari T, Tuominen J, Ludvigsen H et al. Gas sensing using air-guiding photonic bandgap fibers[J]. Optics Express, 12, 4080-4087(2004).

[20] Feng Q L, Jiang M, Wang X F et al. High sensitivity ammonia gas detection with hollow-core photonic bandgap fibers reference gas cavity[J]. Chinese Journal of Lasers, 43, 0305001(2016).

[21] Poletti F, Wheeler N V, Petrovich M N et al. Towards high-capacity fibre-optic communications at the speed of light in vacuum[J]. Nature Photonics, 7, 279-284(2013).

[22] Ghosh S, Sharping J E, Ouzounov D G et al. Resonant optical interactions with molecules confined in photonic band-gap fibers[J]. Physical Review Letters, 94, 093902(2005).

[23] Ghosh S, Bhagwat A R, Renshaw C K et al. Low-light-level optical interactions with rubidium vapor in a core-coated photonic band-gap fiber[J]. Physical Review Letters, 97, 023603(2006).

[24] Bajcsy M, Hofferberth S, Balic V et al. Efficient all-optical switching using slow light within a hollow fiber[J]. Physical Review Letters, 102, 203902(2009).

[25] Sprague M R, Michelberger P S. Champion T F M, et al. Broadband single-photon-level memory in a hollow-core photonic crystal fibre[J]. Nature Photonics, 8, 287-291(2014).

[26] Cregan R F, Mangan B J, Knight J C et al. Single-mode photonic band gap guidance of light in air[J]. Science, 285, 1537-1539(1999).

[27] Benabid F, Couny F, Knight J C et al. Compact, stable and efficient all-fibre gas cells using hollow-core photonic crystal fibres[J]. Nature, 434, 488-491(2005).

[28] Thapa R, Knabe K, Corwin K L et al. Arc fusion splicing of hollow-core photonic bandgap fibers for gas-filled fiber cells[J]. Optics Express, 14, 9576-9583(2006).

[29] Xiao L M, Demokan M S, Jin W et al. Fusion splicing photonic crystal fibers and conventional single-mode fibers: microhole collapse effect[J]. Journal of Lightwave Technology, 25, 3563-3574(2007).

[30] Aghaie K Z. Digonnet M J F, Fan S H. Optimization of the splice loss between photonic-bandgap fibers and conventional single-mode fibers[J]. Optics Letters, 35, 1938-1940(2010).

[31] Zhu T, Xiao F F, Xu L C et al. Pressure-assisted low-loss fusion splicing between photonic crystal fiber and single-mode fiber[J]. Optics Express, 20, 24465-24471(2012).

[32] Gao S F, Wang Y Y, Tian C P et al. Splice loss optimization of a photonic bandgap fiber via a high V-number fiber[J]. IEEE Photonics Technology Letters, 26, 2134-2137(2014).

[33] Kristensen J T, Houmann A, Liu X M et al. Low-loss polarization-maintaining fusion splicing of single-mode fibers and hollow-core photonic crystal fibers, relevant for monolithic fiber laser pulse compression[J]. Optics Express, 16, 9986-9995(2008).

[34] Sun Q, Liu E M, Qin F H et al. All-fiber high-pressure gas cell based on hollow-core photonic crystal fiber[J]. Chinese Journal of Lasers, 35, 1029-1034(2008).

[35] Saitoh K, Mortensen N A, Koshiba M. Air-core photonic band-gap fibers: the impact of surface modes[J]. Optics Express, 12, 394-400(2004).

[36] Frazão O, Carvalho J P, Salgado H M. Low-loss splice in a microstructured fibre using a conventional fusion splicer[J]. Microwave and Optical Technology Letters, 46, 172-174(2005).