Amagqabantshintshi etyhutyha i-lasers

AmagqabantshintshiI-wap ors

Eyona ndlela ngqo yokuvelisai-laserIipulses kukongeza i-modulator ukuya ngaphandle kwe-laser eqhubekayo. Le ndlela inokuvelisa ipulse ye-pickeccond ekhawulezayo, nangona ilula, kodwa inkcitho ekhanyayo kunye namandla encopho azinakudlula amandla akhanyayo. Ke ngoko, eyona ndlela ifanelekileyo yokuvelisa i-laser ye-pumps kukwenzela i-laser kwi-laser ye-laser, ukugcina amandla ngexesha loqeqesho lwepulf kwaye kukhulula ngexesha. Iindlela ezine eziqhelekileyo ezisetyenziselwa ukuvelisa iipuzzle ze-Laser Cavity zifumana i-Switch, i-Q-Swings (i-Swing (ilahleko), i-cavity ikhutshiwe, kunye nendlela yokuvalela.

I-Switch yokutshintsha ivelisa iipuzzle ezimfutshane ngokwenza impompo yamandla. Umzekelo, i-semiconductor ifumana i-lasers eguqulweyo inokuvelisa iipuzzle kwikhulu le-nanosecond ukuya kwikhulu le-picoseconds ngemo yemongoku. Nangona amandla empungutye iphantsi, le ndlela iguquguquka kakhulu, njengokubonelela rhoqo ngotshintsho kunye nobubanzi be-pullage. Ngo-2018, abaphandi kwiDyunivesithi yaseTokyo baxele i-febtosecond yokufumana i-semiconductor lemiconductor lamer, emele ikhefu kwibhotile yeminyaka engama-40 yobugcisa.

Iipulses ezinamandla ze-nanosencond ziveliswa ziindlela eziguqulweyo ze-Q, ezikhutshelwa kwiindlela ezahlukeneyo ezijikelezayo, kwaye amandla ane-pulse akwiillijoules ezininzi kwii-millijoules ezininzi ukuya kubukhulu benkqubo. Amandla aphakathi (ngokubanzi ngezantsi kwe-1 μj) I-Picoosecond kunye ne-femussecond iveliswe ikakhulu yi-Lasers evaliweyo. Kukho enye okanye ngaphezulu i-ultrashort ivutha kwi-laser ye-laser emjikelezayo ngokuqhubekayo. I-vem nganye ye-intracavity iguqula ipulse ngokusebenzisa isibuko sokunxibelelanisa, kwaye i-Refroct iphakathi kwe-10 MHZ kunye ne-100 GHZ. Umzobo ongezantsi ubonakalisa ukusasazeka okuqhelekileyo okuqhelekileyo (i-ANI) e-Soliton FebkondIsixhobo seFiber LaserUninzi lwayo olunokwakhiwa lusebenzise izinto ezisemgangathweni ze-tirlabs (ifibre, lens, intaba kunye netafile ye-subcecent).

Indlela ye-cavity ye-captive isetyenziselwaI-QUkufumana iipulses ezimfutshane kunye neendlela ezivaliweyo zemowudi ukwandisa amandla e-pulse ngemali esezantsi.

I-Domain yexesha kunye ne-frequency domain pilses
Ubume belayini yepulse kunye nexesha lulula ngokubanzi kwaye lubonakaliswa yiMisebenzi yaseGaussian neSechē. Ixesha lokuphosa (okwaziwa ngokuba nobubanzi be-pulse) kudla ngokuvakaliswa bububanzi becala lobubanzi (i-FWHM), oko kukuthi, ububanzi bamandla okuphezulu bungaphezulu kwesiqingatha samandla encopho; I-Q
I-Lasers evaliweyo evaliweyo ivelise i-Ultra-Sulses (i-USP) ngolungelelwano lwamashumi e-picosecond ukuya kwi-phytosencos. I-elektroniki i-owronics inokulinganisa ishumi kuphela leepikniki, kwaye iipuse ezimfutshane zinokulinganiswa kuphela ngetekhnoloji yokukhanya enjenge-autocorrelators, isele kunye nesigcawu. Ngelixa i-nanosecond okanye ixesha elide itshintshe ububanzi babo benkcitho njengoko behamba, nkqu naphezu kwemigama emide, izitya ezimfutshane ze-ultra ziyachaphazeleka ziintlobo ezahlukeneyo:

Ukusasazeka kunokubangela ukuba kunyuke ipulse enkulu, kodwa kunokuhlelwa kukuphambuka okuchaseneyo. Lo mzobo ulandelayo ubonakalisa ukuba i-tertoand ye-fertosecond ye-fersecond ihlawula indlela yokusasazeka kweMicroscope.

Ukungathobeli ngokubanzi akuchaphazeli ngokuthe ngqo ububanzi be-pulse, kodwa yandise i-bandwidth, esenza ukuba i-pulse ibetheleleka ngakumbi ekusasazeni ekusasazeni. Naluphi na uhlobo lwefayibha, kubandakanya amanye amajelo eendaba ngebhendi encinci, inokuchaphazela ubume be-bandwidth okanye i-ultra-pulse, kunye nokuhla kwe-bandwidth kunokukhokelela ekuxhaphakeni ngexesha; Kukho amatyala apho ububanzi be-pullages ye-chibles i-chiard iba mfutshane xa i-spectrium iba mncinci.