Nhazi ụzọ anya nke 66-femtosekọndlaser akpọchiri ụdịdị
Laser a nke nwere usoro mkpọchi nke 66-femtosekọnd bụ laser eriri ytterbium nke na-ejigide oghere dị larịị nke nwere ihe na-agbanwe agbanwe nke na-abụghị nke na-agbanwe agbanwe. Ọ na-enweta mkpọchi ụdị ugboro ugboro 147 MHz. Site n'ịgbanwe anya dị n'etiti gratings ahụ, a na-enweta obosara spectral nke 39.8 nm na obosara pulse nke 66 fs mgbe enwetasịrị nrụgide mpụga. Na ike mgbapụta dị elu, a na-enweta mkpọchi ụdị harmonic nke abụọ na nke atọ yana ugboro ugboro ugboro nke 294.1 MHz na 442.3 MHz.
Nkọwa ụzọ anya:
Resonator ahụ nwere akụkụ anya oghere n'akụkụ abụọ yana akụkụ eriri na-echekwa polarization n'etiti. Akụkụ oghere aka ekpe gụnyere enyo ntụgharị zuru oke (M1), efere ebili mmiri λ/8 (EWP), na Faraday rotator (FR). Enwere ike iji njikọta nke EWP na FR dị ka ihe na-agbanwe usoro na-abụghị nke na-agbanwe agbanwe, na-enye enweghị mgbanwe usoro, si otú a na-eme ka ikike ịmalite onwe ya dịkwuo mma. Akụkụ eriri ahụ nwere ngwaọrụ agbakwunyere nkewa wavelength multiplexing - collimator (WDM-Collimator), eriri na-echekwa polarization-maintaining nke 62 cm ytterbium (Yb401-PM, CORACTIVE), na eriri optical collimator (Col). A na-eji otu ụdị laser diode 976 nm (LD) nke nwere ike mgbapụta kachasị elu nke 1.4 W na-eme ka eriri gain ahụ gbapụta. Akụkụ oghere ziri ezi nwere efere ọkara-ebili (HWP), ihe na-ekewapụta oghere polarization (PBS), ihe na-ekewa grating pair (LightSmyth T-1000-1040-3212-94), na enyo ntụgharị zuru oke (M2). Njikọ grating transmission nwere njupụta ahịrị nke ahịrị 1000/mm na-enye nkwụghachi mgbasa n'ime oghere. Enwere ike ịgbanwe anya dị n'etiti gratings abụọ ahụ site na ogbo. Ogologo oghere efu site na collimator ruo enyo ntụgharị abụọ dị n'akụkụ abụọ ahụ bụ 5.5 cm na 6.5 cm n'otu n'otu.laserna-emepụta mkpali n'ụzọ kwụ ọtọ site na PBS.
Ụkpụrụ ọrụ:
Mkpụrụ obi mbụ a na-eme ka ọ dị mma nke a na-ebufe site na oghere intracavity na-amalite site na PBS ma na-ebufe ya na M1. Na mbụ, HWP ga-agbaze mkpali ahụ n'ime ihe abụọ orthogonal, wee banye eriri optical na-echekwa polarization ma gbasaa n'akụkụ axes ngwa ngwa na nwayọ. A na-ekpebi oke ike nke mkpali n'akụkụ axes orthogonal abụọ site na akụkụ ntụgharị (θh) nke HWP. N'oge mgbasa n'ime eriri optical, n'ihi mmetụta na-abụghị ahịrị, ike asymmetric nke mkpali polarized orthogonal ga-eme ka mgbanwe nke usoro na-abụghị ahịrị metụtara ike. Mirror njedebe M1 na-eme ka mkpali orthogonal gafere site na mgbanwe nke usoro ugboro abụọ ma laghachi na eriri optical na-echekwa polarization. Mkpụrụ obi orthogonal na-enweta mgbanwe nke usoro π/2 na-abụghị nke na-agbanwe ma na-agbanwe axis optical mgbasa. Enweghị nkwekọ ọsọ otu n'etiti mkpali polarized orthogonal na-eduga na nkwụghachi nke mmetụta nke mgbanwe. N'ikpeazụ, mkpali ahụ na-anakọta mgbanwe nke usoro na-abụghị ahịrị dị iche iche ma na-enweta nnyonye anya na PBS. Dịka polarizer, PBS na-ekwe ka pulses steeti polarization kwesịrị ekwesị gafee, ebe ndị ọzọ na-apụta ìhè site na oghere ahụ. Usoro a na-arụ ọrụ dị ka ihe na-amịkọrọ ihe e ji aka rụọ n'ime oghere ahịrị a.laser anyaMgbe a na-ebelata anya nke abụọ nke grating ruo 3.2 mm, nsọtụ aka ekpe nke spectrum ahụ na-aghọ nke dị elu nke ukwuu. N'oge a, mgbasa nke oghere ahụ na-adị mma, a na-enwetakwa ike kachasị nke otu-pulse nke 3.57 nJ. A na-eji ọrụ Gaussian, nke bụ 66 fs, etinye akara njikọ onwe onye nke pulse nwetara site na mkpakọ mpụga nke pulse nwere obosara spectral 39.8 nm kachasị obosara.
Oge ozi: Feb-25-2026