Izinhlobo ze-laser tunable

Izinhlobo zei-laser ephathekayo

Ukusetshenziswa kwama-laser aguqulekayo ngokuvamile kungahlukaniswa ngezigaba ezimbili ezinkulu: esisodwa kulapho ama-laser omugqa owodwa noma wemigqa eminingi engashintshi ye-wavelength engakwazi ukuhlinzeka ngamaza angamaza adingekayo owodwa noma ngaphezulu; Esinye isigaba sibandakanya izimo lapho i-laserubude begagasi kufanele bucushwe ngokuqhubekayo phakathi nokuhlolwa noma ukuhlolwa, okufana ne-spectroscopy nokuhlolwa kokubona iphampu.

Izinhlobo eziningi zamalaser aguqulekayo zingakhiqiza okuphumayo kwe-turable continuous wave (CW), nanosecond, picosecond noma femtosecond pulse. Izici zayo zokuphuma zinqunywa i-laser gain medium esetshenziswa. Imfuneko eyisisekelo yama-laser ashintshwayo ukuthi angakhipha ama-laser phezu kobubanzi obuhlukahlukene bamaza. Izingxenye ze-optical ezikhethekile zingasetshenziswa ukukhetha ama-wavelength athile noma ama-wavelength amabhande kumabhendi aphumayoama-laser asebenzayo. Lapha sizokwethula ama-lasers ambalwa ajwayelekile asebenzisekayo kuwe

I-laser ye-wave ye-wave emile ye-CW tunable

Ngokomqondo, iI-laser ye-CW etholakalayoi-laser architecture elula kakhulu. Le laser ihlanganisa isibuko esibonisa ukukhanya okuphezulu, isibuko sokuzuza kanye nesibuko esihlanganisayo esiphumayo (bheka Umfanekiso 1), futhi inganikeza okukhiphayo kwe-CW kusetshenziswa imidiya yenzuzo ye-laser ehlukahlukene. Ukuze kuzuzwe i-tunability, indawo yokuzuza engamboza ububanzi obuqondiwe be-wavelength idinga ukukhethwa.

2. I-laser yeringi ye-CW ye-tunable

Ama-lasers eringi kade asetshenziswa ukuze kuzuzwe okukhiphayo kwe-CW okuguqulekayo ngemodi eyodwa yobude, enomkhawulokudonsa obonakalayo ebangeni le-kilohertz. Ngokufana nama-laser amagagasi amile, ama-laser eringi angakwazi ukusebenzisa odayi kanye nesafire ye-titanium njengemithombo yezindaba. Odayi banganikeza ububanzi bomugqa omncane kakhulu obungaphansi kuka-100 kHz, kuyilapho i-titanium sapphire inikeza ububanzi bomugqa obungaphansi kuka-30 kHz. Ububanzi bokushuna belaser kadayi bungu-550 kuye ku-760 nm, kanti lelaser ye-titanium sapphire bungu-680 kuya ku-1035 nm. Imiphumela yazo zombili izinhlobo zamalaser ingaba imvamisa-kabili kubhendi ye-UV.

3. Imodi ekhiyiwe i-laser eqhubekayo

Ezinhlelweni eziningi, ukuchaza ngokucacile izici zesikhathi zokukhishwa kwe-laser kubaluleke kakhulu kunokuchaza amandla ngokunembile. Eqinisweni, ukufeza ama-optical pulses amafushane kudinga ukucushwa kwesikhala esinamamodi amaningi e-longitudinal azwakalayo kanyekanye. Uma lawa mamodi we-cyclic longitudinal enobudlelwano besigaba esimisiwe ngaphakathi kwe-laser cavity, i-laser izokhiywa imodi. Lokhu kuzokwenza ukuthi ukushaya kwenhliziyo okukodwa kuhambe phakathi komgodi, nesikhathi sawo esichazwa ubude be-laser cavity. Ukukhiya imodi esebenzayo kungafinyelelwa ngokusebenzisa ii-acousto-optic module(AOM), noma ukukhiya kwemodi yokwenziwa kungenziwa ngelensi ye-Kerr.

4. I-laser ye-ytterbium esheshayo

Nakuba ama-laser e-titanium sapphire enokusebenza okubanzi, okunye ukuhlola kwe-biological imaging kudinga ubude bamaza amade. Inqubo evamile yokumuncwa kwezithombe ezimbili ijatshuliswa ama-photon anobude begagasi obungu-900 nm. Ngoba amaza amade amade asho ukuhlakazeka okuncane, amaza amade enjabulo angaqhuba ngempumelelo izivivinyo zebhayoloji ezidinga ukujula kwesithombe okujulile.

Namuhla, ama-laser aguqulekayo asetshenziswe emikhakheni eminingi ebalulekile, kusukela ocwaningweni lwesayensi oluyisisekelo kuya ekukhiqizweni kwe-laser kanye nesayensi yempilo nezempilo. Ibanga lobuchwepheshe elitholakalayo njengamanje libanzi kakhulu, liqala ezinhlelweni ezilula eziguqulekayo ze-CW, ububanzi bayo bomugqa obuncane bungase busetshenziswe ekubukeni okunesinqumo esiphezulu, ukuthwebula kwamangqamuzana nama-athomu, kanye nokuhlolwa kwe-quantum optics, okuhlinzeka ngolwazi olubalulekile kubacwaningi besimanje. Abakhiqizi be-laser banamuhla banikeza izixazululo zokuma okukodwa, okuhlinzeka nge-laser ephuma ngaphezu kuka-300 nm ngaphakathi kwebanga lamandla le-nanojoule. Amasistimu ayinkimbinkimbi kakhulu ahlanganisa ububanzi obuhlaba umxhwele obungu-200 kuya ku-20,000 nm kububanzi bamandla be-microjoule nama-millijoule.