Isimiso esiyisisekelo se-Optical modulator

I-modulator yokukhanya, esetshenziswa ukulawula ubukhali bokukhanya, ukuhlukaniswa kwe-electro-optic, i-thermooptic, i-acoustooptic, konke okubonakalayo, inkolelo-mbono eyisisekelo yomphumela we-electro-optic.
I-modulator ye-Optical ingenye yamadivayisi abaluleke kakhulu e-optical ehlanganisiwe ekuxhumaneni kwe-optical okusheshayo kanye nebanga elifushane. I-modulator yokukhanya ngokwesimiso sayo sokuguquguquka, ingahlukaniswa ibe yi-electro-optic, i-thermooptic, i-acoustooptic, yonke i-optical, njll., isekelwe embonweni oyisisekelo wezinhlobo ezahlukene zomphumela we-electro-optic, umphumela we-acoustooptic, umphumela we-magnetooptic, umphumela we-Franz-Keldysh, umphumela we-quantum Stark, umphumela wokusabalala komthwali.

Ii-modulator ye-electro-opticaliyidivayisi elawula inkomba yokukhanya, ukumuncwa, ubukhulu noma isigaba sokukhanya okuphumayo ngokushintsha kwe-voltage noma insimu kagesi. Ingcono kunezinye izinhlobo zama-modulator maqondana nokulahlekelwa, ukusetshenziswa kwamandla, isivinini kanye nokuhlanganiswa, futhi iyi-modulator esetshenziswa kakhulu njengamanje. Enkambisweni yokudlulisa ukukhanya, ukudlulisa kanye nokwamukela, i-modulator ye-optical isetshenziswa ukulawula ubukhali bokukhanya, futhi indima yayo ibaluleke kakhulu.

Inhloso yokushintshashintsha kokukhanya ukuguqula isignali oyifunayo noma ulwazi oludlulisiwe, okuhlanganisa "ukususa isignali yangemuva, ukususa umsindo, kanye nokulwa nokuphazamiseka", ukuze kube lula ukucubungula, ukudlulisa nokubona.

Izinhlobo zokuguquguquka zingahlukaniswa ngezigaba ezimbili ezibanzi kuye ngokuthi ulwazi lulayishwa kuphi kugagasi lokukhanya:

Enye amandla okushayela omthombo wokukhanya alawulwa yisignali kagesi; Enye iwukulawula ukusakaza ngqo.

Eyokuqala isetshenziswa kakhulu ekuxhumaneni kwe-optical, kanti eyesibili isetshenziswa kakhulu ekuboneni kwe-optical. Ngamafuphi: ukuguquguquka kwangaphakathi kanye nokuguquguquka kwangaphandle.

Ngokwendlela yokuguqula, uhlobo lokuguqula luyi:

1) Ukuguqulwa kwamandla;

2) Ukuguqulwa kwesigaba;

3) Ukuguqulwa kwe-polarization;

4) Ukuguqulwa kwemvamisa kanye nobude be-wavelength.

1.1, ukuguqulwa kwamandla

Ukuguqulwa kwamandla okukhanya kungukugqama kokukhanya njengento yokuguqulwa, ukusetshenziswa kwezinto zangaphandle ukukala i-DC noma ukushintsha kancane kwesignali yokukhanya ibe ushintsho olusheshayo lwemvamisa yesignali yokukhanya, ukuze i-amplifier yokukhetha imvamisa ye-AC ingasetshenziswa ukukhulisa, bese kuba nenani okufanele lilinganiswe njalo.

1.2, ukuguqulwa kwesigaba

Isimiso sokusebenzisa izinto zangaphandle ukushintsha isigaba samaza okukhanya kanye nokulinganisa ubuningi obubonakalayo ngokuthola izinguquko zesigaba sibizwa ngokuthi i-optical phase modulation.

Isigaba segagasi lokukhanya sinqunywa ubude obubonakalayo bokusabalalisa kokukhanya, inkomba yokukhanya ye-propagation medium kanye nokusatshalaliswa kwayo, okungukuthi, ushintsho lwesigaba segagasi lokukhanya lungadalwa ngokushintsha amapharamitha angenhla ukuze kufezwe ukuguqulwa kwesigaba.

Ngenxa yokuthi isitholi sokukhanya ngokuvamile asikwazi ukubona ushintsho lwesigaba segagasi lokukhanya, kumele sisebenzise ubuchwepheshe bokuphazamiseka kokukhanya ukuguqula ushintsho lwesigaba lube ushintsho lobukhali bokukhanya, ukuze kufezwe ukutholakala kobuningi obubonakalayo bangaphandle, ngakho-ke, ukuguqulwa kwesigaba sokubona kufanele kufake izingxenye ezimbili: enye indlela engokoqobo yokukhiqiza ushintsho lwesigaba segagasi lokukhanya; eyesibili ukuphazamiseka kokukhanya.

1.3. Ukuguqulwa kwe-polarization

Indlela elula yokufeza ukuguqulwa kokukhanya iwukuzungeza ama-polarizer amabili maqondana nomunye nomunye. Ngokusho kwe-theorem kaMalus, ukuqina kokukhanya okukhiphayo yi-I=I0cos2α

Lapho: I0 imele ukukhanya okudluliswa yi-polarizers ezimbili lapho indiza eyinhloko ihambisana; I-Alpha imele i-Engela phakathi kwezindiza eziyinhloko ze-polarizers ezimbili.

1.4 Ukuguqulwa kwemvamisa kanye nobude be-wavelength

Isimiso sokusebenzisa izici zangaphandle ukushintsha imvamisa noma ubude besikhathi bokukhanya kanye nokukala ubungako bangaphandle obubonakalayo ngokubona izinguquko kubude besikhathi noma ubude besikhathi bokukhanya sibizwa ngokuthi ukuguqulwa kwemvamisa kanye nobude besikhathi bokukhanya.