ʻO ka hoʻolālā ala Optical o nā laser pulsed rectangular

ʻO ka hoʻolālā ala Optical o ka ʻāpana ʻehānā laser pulsed

Nānā o ka hoʻolālā ala Optical

ʻO ke ʻano passive-locked dual-wavelong dissipative soliton resonant thulium-doped fiber laser e pili ana i kahi hoʻolālā aniani apo aniani nonlinear.

2. ʻO ka wehewehe ʻana i ke ala Optical

ʻO ka lōʻihi nalu lua dissipative soliton resonant thulium-dopedfiber laserhoʻohana i ka hoʻolālā ʻano o ka lua “8″ (Figure 1).

ʻO ka ʻaoʻao hema ka loop unidirectional nui, ʻoiai ʻo ka ʻaoʻao ʻākau he nonlinear optical fiber loop loop structure. Aia ka loop unidirectional hema i kahi puʻupuʻu puʻupuʻu, he 2.7m thulium-doped fiber optical (SM-TDF-10P130-HE), a me kahi hui 2 μm band optical fiber me ka coefficient coupling o 90:10. Hoʻokahi polarization-dependent Isolator (PDI), ʻelua Polarization Controllers (Polarization controllers: PC), a 0.41m Polarization-maintenance Fiber (PMF). Loaʻa ka nonlinear fiber optic apo aniani i ka ʻākau ma ka hoʻopili ʻana i ke kukui mai ka puka unidirectional hema i ka nonlinear fiber optic apo aniani ma ka ʻākau ma o ka 2 × 2 structure optical coupler me ka helu o 90:10. Aia i loko o ka ʻaoʻao ʻaoʻao ke aniani o ke aniani fiber optical nonlinear he fiber optical 75-mika-lōʻihi (SMF-28e) a me kahi mea hoʻoponopono polarization. Hoʻohana ʻia kahi 75-mika hoʻokahi-mode fiber optical e hoʻonui i ka hopena nonlinear. Ma ʻaneʻi, hoʻohana ʻia kahi mea hoʻohui fiber optical 90:10 e hoʻonui i ka ʻokoʻa o ka pae nonlinear ma waena o ka hoʻolaha ʻana i ka uaki a me ka counterclockwise. ʻO 89.5 mika ka lōʻihi holoʻokoʻa o kēia hale hawewe lua. Ma kēia hoʻonohonoho hoʻokolohua, hele mua ke kukui pahū ma waena o ka hui pū ʻana a hiki i ka loaʻa ʻana o ka fiber optical thulium-doped medium. Ma hope o ka thulium-doped fiber optical, ua hoʻopili ʻia kahi huila 90:10 e hoʻopuʻi i 90% o ka ikehu i loko o ka lua a hoʻouna i 10% o ka ikehu mai loko mai o ka lua. I ka manawa like, ua haku ʻia kahi kānana Lyot birefringent me kahi fiber optical mālama polarization ma waena o ʻelua mau mea hoʻokele polarization a me kahi polarizer, kahi hana i ke kānana ʻana i nā nalu spectral.

3. ʻIke hope

I kēia manawa, ʻelua mau ala kumu no ka hoʻonui ʻana i ka ikehu pulse o nā laser pulsed. ʻO kekahi ala e hoʻemi pololei i nā hopena nonlinear, me ka hoʻohaʻahaʻa ʻana i ka mana kiʻekiʻe o nā pulses ma o nā ʻano like ʻole, e like me ka hoʻohana ʻana i ka hoʻokele dispersion no nā pulses stretched, giant chirped oscillators, a me beam-splitting pulsed lasers, etc. Hiki i ke ala i ʻōlelo ʻia ma luna ke hoʻonui i ka ikehu pulse o kalaser puʻupuʻui nā ʻumi o nā nanojoules. ʻO ka dissipative soliton resonance (Dissipative soliton resonance: DSR) he hana hoʻokumu impulse rectangular i manaʻo mua ʻia e N. Akhmediev et al. i 2008. Ka hiʻona o dissipative soliton resonance pulses mea, oiai e malama ana i ka amplitude mau, ka pulse laula a me ka ikehu o ka non-wave splitting rectangular pulse hoʻonui monotonically me ka hoʻonui o ka mana pump. ʻO kēia, i kekahi ʻano, ua haki i ka palena o ka manaʻo soliton kuʻuna ma ka ikehu puʻupuʻu hoʻokahi. Hiki ke hoʻokō ʻia ka resonance soliton dissipative ma ke kūkulu ʻana i ka absorption saturated a hoʻohuli i ka absorption saturated, e like me ka nonlinear polarization rotation effect (NPR) a me ka nonlinear fiber ring mirror effect (NOLM). ʻO ka hapa nui o nā hōʻike e pili ana i ka hoʻokumu ʻana i nā pulses dissipative soliton resonance i hoʻokumu ʻia ma kēia mau ʻano hana laka ʻelua.