Uyilo lwendlela yokukhanya ye-rectangular pulsed lasers

Uyilo lwendlela ebonakalayo yoxandeiileza ezishukumayo

Isishwankathelo soyilo lwendlela yokukhanya

I-laser yefayibha edisposabled ene-dual-wavelength dissipative soliton resonant thulium-doped fiber laser esekwe kwisakhiwo sesipili se-fiber ring esingelulo ulayini.

2. Inkcazo yendlela ebonakalayo

I-dual-wavelength dissipative soliton resonant thulium-dopedi-laser yefayibhayamkela uyilo lwesakhiwo somngxuma esimile okwe-"8″ (Umfanekiso 1).

Inxalenye yasekhohlo yiloopi ephambili ejikelezayo, ngelixa inxenye yasekunene iyisakhiwo sesipili se-fiber loop ye-optical engeyomgca. Iloopi yasekhohlo ejikelezayo iquka i-bundle splitter, i-fiber optical efakwe i-thulium eyi-2.7m (SM-TDF-10P130-HE), kunye ne-2 μm band optical fiber coupler ene-coupling coupling ye-90:10. I-Isolator enye exhomekeke kwi-polarization-dependent (PDI), ii-Polarization Controllers ezimbini (ii-Polarization controllers: PC), i-0.41m Polarization-maintenance Fiber (PMF). Isakhiwo sesipili se-fiber optic ring esingeyomgca ngasekunene sifezekiswa ngokuhlanganisa ukukhanya ukusuka kwiloopi yasekhohlo engasemva ejikelezileyo ukuya kwisipili se-fiber optic ring esingeyomgca ngasekunene ngokusebenzisa i-2×2 structure optical coupler ene-coefficient ye-90:10. Isakhiwo sesipili se-fiber optic ring esingeyomgca ngasekunene siquka i-fiber optical fiber engama-75-meter ubude (SMF-28e) kunye ne-polarization controller. I-fiber optical ye-single-mode engama-75 yeemitha isetyenziselwa ukuphucula isiphumo esingesiso i-linear. Apha, i-coupler ye-fiber optical engama-90:10 isetyenziswa ukwandisa umahluko wesigaba esingesiso i-linear phakathi kokusasazeka kwewotshi kunye ne-counterclockwise. Ubude obupheleleyo besi sakhiwo se-dual-wavelength yi-89.5 yeemitha. Kolu lungiselelo lovavanyo, ukukhanya kwepompo kuqala kudlula kwi-beam combiner ukuze kufikelelwe kwi-gain medium thulium-doped optical fiber. Emva kwe-thulium-doped optical fiber, i-coupler ye-90:10 iqhagamshelwe ukujikeleza i-90% yamandla ngaphakathi kwe-cavity kwaye ithumele i-10% yamandla ngaphandle kwe-cavity. Kwangaxeshanye, i-birefringent Lyot filter yenziwe yi-fiber optical egcina i-polarization ephakathi kwabalawuli ababini be-polarization kunye ne-polarizer, edlala indima ekuhluzeni amaza e-spectral.

3. Ulwazi oluvela kwimvelaphi

Okwangoku, kukho iindlela ezimbini ezisisiseko zokwandisa amandla okubetha kwentliziyo yee-laser ezishukumayo. Enye indlela kukunciphisa ngokuthe ngqo iziphumo ezingezizo ezingcambu, kubandakanya ukunciphisa amandla aphezulu ee-pulses ngeendlela ezahlukeneyo, njengokusebenzisa ulawulo lokusasazwa kwee-pulses ezityumkileyo, ii-oscillators ezinkulu ezitshixizayo, kunye nee-laser ezishukumayo eziqhekekileyo, njl. Enye indlela kukufuna iindlela ezintsha ezinokunyamezela ukuqokelelwa kwe-nonlinear phase, ezifana nokufana kwazo kunye nee-rectangular pulses. Le ndlela ikhankanyiweyo apha ngasentla inokuphucula ngempumelelo amandla okubetha kwentliziyoi-pulsed laserukuya kumashumi ee-nanojoules. I-Dissipative soliton resonance (i-Dissipative soliton resonance: DSR) yindlela yokwenza i-rectangular impulse eyaqalwa yacetywa ngu-N. Akhmediev et al. ngo-2008. Uphawu lwee-dissipative soliton resonance pulses kukuba, ngelixa igcina i-amplitude ingaguquki, ububanzi be-pulse kunye namandla e-non-wave splitting rectangular pulse ayanda ngokuphindaphindiweyo ngokonyuka kwamandla epompo. Oku, ukuya kwinqanaba elithile, kudlula umda wethiyori yendabuko ye-soliton kumandla e-single-pulse. I-Dissipative soliton resonance inokufezekiswa ngokwakha i-saturated absorption kunye ne-reverse saturated absorption, njenge-nonlinear polarization rotation effect (NPR) kunye ne-nonlinear fiber ring mirror effect (NOLM). Uninzi lweengxelo malunga nokuveliswa kwee-dissipative soliton resonance pulses zisekelwe kwezi ndlela zimbini zokutshixa imo.