Teknụzụ Laser dị warara dị warara akụkụ nke abụọ
N'afọ 1960, laser ruby mbụ nke ụwa bụ laser steeti siri ike, nke e ji ike mmepụta dị elu na mkpuchi ogologo ogologo oge mara.Ọdịdị oghere pụrụ iche nke laser steeti siri ike na-eme ka ọ dịkwuo mfe n'ichepụta mmepụta linewidth dị warara.Ka ọ dị ugbu a, ụzọ ndị bụ isi etinyere gụnyere usoro oghere dị mkpụmkpụ, usoro mgbanaka otu ụzọ, usoro ọkọlọtọ intracavity, usoro oghere nke torsion pendulum, usoro grating olu Bragg na usoro ịgba mkpụrụ.
Onyonyo 7 na-egosi nhazi nke ọtụtụ ahụkarị otu-longitudinal mode siri ike-ala lasers.
Ọgụgụ 7 (a) na-egosi ụkpụrụ ọrụ nke nhọrọ ọnọdụ ogologo ogologo dabere na ọkọlọtọ FP in-cavity, ya bụ, a na-eji ụdị mgbasa ozi dị warara dị warara nke ọkọlọtọ iji mee ka mfu nke ụdị ogologo ogologo ndị ọzọ, nke mere na ụdị ogologo ogologo ndị ọzọ. na-nyochaa na mode asọmpi usoro n'ihi na ha obere transmittance, nke mere na-enweta otu longitudinal mode ọrụ.Na mgbakwunye, enwere ike nweta ụfọdụ nsonazụ nlegharị anya n'ogologo wavelength site na ijikwa Angle na ọnọdụ okpomọkụ nke ọkọlọtọ FP na ịgbanwe oge etiti ọnọdụ ogologo.FIG.7(b) na (c) egosi oscillator mgbanaka na-abụghị planar (NPRO) na usoro oghere nke torsional pendulum ejiri nweta otu mmepụta ụdị ogologo ogologo.The na-arụ ọrụ ụkpụrụ bụ ime ka doo propagate na otu ntụziaka na resonator, n'ụzọ dị irè kpochapụ na-ezighị ezi gbasara ohere nkesa nke ọnụ ọgụgụ nke tụgharịa ahụ na nkịtị guzo ife oghere, ma si otú zere mmetụta nke ohere oghere ọkụ mmetụta iji nweta a a. mmepụta ụdị ogologo otu.Ụkpụrụ nke nnukwu Bragg grating (VBG) mode nhọrọ yiri nke semiconductor na fiber warara ahịrị-obosara lasers nke a kpọtụrụ aha na mbụ, ya bụ, site na iji VBG dị ka ihe nzacha, dabere na ezigbo spectral selectivity na Angle selectivity, the oscillator oscillates na a kpọmkwem wavelength ma ọ bụ band iji nweta ọrụ nke longitudinal mode nhọrọ, dị ka e gosiri na Figure 7(d).
N'otu oge ahụ, enwere ike ijikọta ọtụtụ ụzọ nhọrọ usoro ogologo ogologo dị ka mkpa iji meziwanye ọnọdụ nhọrọ ziri ezi, n'ihu warara linewidth, ma ọ bụ mee ka asọmpi ọnọdụ ahụ dị ike site n'iwebata mgbanwe mgbanwe na-adịghị na ntanetị na ụzọ ndị ọzọ, ma gbasaa mmepụta wavelength nke. laser mgbe ọ na-arụ ọrụ na warara linewidth, nke siri ike ime makasemiconductor lasernaeriri lasers.
(4) Brillouin laser
Brillouin laser dabeere na mmetụta Brillouin chụsasịrị (SBS) iji nweta mkpọtụ dị ala, teknụzụ mmepụta linewidth dị warara, ụkpụrụ ya bụ site na foton na mmekọrịta dị n'ime ime ụlọ iji mepụta ụfọdụ mgbanwe ugboro nke Stokes photons, ma na-abawanye ụba n'ime nweta bandwit.
Onyonyo 8 na-egosi eserese dị larịị nke ntụgharị SBS na nhazi ntọala nke laser Brillouin.
N'ihi ụda mkpọtụ dị ala nke ubi acoustic, ngbanwe nke Brillouin na-abụkarị naanị 0.1-2 cm-1, yabụ na laser 1064 nm dị ka ọkụ mgbapụta, ogologo ikuku nke Stokes na-abụkarị naanị ihe dịka 1064.01 nm, mana nke a pụtakwara na arụmọrụ ntughari quantum ya dị oke elu (ruo 99.99% na tiori).Na mgbakwunye, n'ihi na Brillouin nweta linewidth nke ọkara na-abụkarị naanị nke usoro nke MHZ-ghz (na Brillouin nweta linewidth nke ụfọdụ siri ike mgbasa ozi bụ naanị banyere 10 MHz), ọ bụ nnọọ obere karịa uru linewidth nke laser na-arụ ọrụ ihe. nke iji nke 100 GHz, otú, The Stokes obi ụtọ na Brillouin laser nwere ike na-egosi doro anya ụdịdị dị iche iche narrowing phenomenon mgbe multiple amplification na oghere, na ya mmepụta akara obosara bụ ọtụtụ iwu nke ịdị ukwuu narrower karịa mgbapụta ahịrị obosara.Ka ọ dị ugbu a, laser Brillouin abụrụla ebe nyocha na mpaghara fotonics, enweela ọtụtụ akụkọ gbasara usoro Hz na nke sub-Hz nke mmepụta linewidth dị warara nke ukwuu.
Na-adịbeghị anya, Brillouin ngwaọrụ na waveguide Ọdịdị apụtawo na ubi nkengwa ngwa fotonics, ma na-etolite ngwa ngwa na ntụziaka nke miniaturization, njikọ dị elu na mkpebi dị elu.Na mgbakwunye, laser Brillouin na-agba oghere nke dabere na ihe kristal ọhụrụ dị ka diamond abanyekwala n'ọhụụ ndị mmadụ n'ime afọ abụọ gara aga, ihe nrụpụta ọhụrụ ya na ike nke usoro ebili mmiri na oghere SBS cascade, ike nke laser Brillouin. ruo 10 W ịdị ukwuu, na-atọ ntọala maka ịgbasa ngwa ya.
Nkwekọrịta izugbe
Site na nyocha na-aga n'ihu nke ihe ọmụma dị oke ọnụ, lasers linewidth abụrụla ngwa dị mkpa na nyocha sayensị na arụmọrụ ha dị mma, dị ka interferometer laser LIGO maka nchọpụta ebili mmiri ndọda, nke na-eji ogologo ahịrị dị warara otu ugboro.laserna ogologo nke 1064 nm dị ka isi iyi mkpụrụ, na linewidth nke ìhè mkpụrụ dị n'ime 5 kHz.Ke adianade do, warara-obosara lasers na wavelength tunable na ọ dịghị mode na-awụlikwa elu na-egosikwa oké ngwa ike, karịsịa na coherent nkwukọrịta, nke nwere ike zuru okè izute mkpa nke wavelength nkewa multiplexing (WDM) ma ọ bụ ugboro nkewa multiplexing (FDM) maka wavelength (ma ọ bụ ugboro ugboro). ) Tunability, na a na-atụ anya na ọ ga-abụ isi ngwaọrụ nke ọgbọ na-esote teknụzụ nzikọrịta ozi mkpanaka.
N'ọdịnihu, ihe ọhụrụ nke ihe laser na nkà na ụzụ nhazi ga-akwalite mkpakọ nke laser linewidth, mma nke nkwụsi ike ugboro ugboro, mgbasawanye nke wavelength nso na mma nke ike, na-emepe ụzọ maka mmadụ nchọpụta nke ụwa na-amaghị.
Oge nzipu: Nov-29-2023