Incamake y'ibikoresho bine bisanzwe by'ikoranabuhanga

Incamake y'ibikoresho bine bisanzwe by'ikoranabuhanga

Iyi nyandiko igaragaza uburyo bune bwo guhindura (guhindura amplitude ya laser mu gice cy'igihe cya nanosecond cyangwa subnanosecond) bukoreshwa cyane muri sisitemu ya fiber laser. Ubu buryo burimo AOM (acousto-optic modulation), EOM (electro-optic modulation), SOM/SOA(kongera urumuri rwa semiconductor kandi bizwi nka semiconductor modulation), namodulation ya laser itaziguyeMuri bo, AOM,EOM,SOM ni iya modulation yo hanze, cyangwa modulation itaziguye.

1. Modulator y'amajwi n'amajwi (AOM)

Guhinduranya acousto-optic ni inzira ikoreshwa mu buryo bw'umubiri ikoresha ingaruka za acousto-optic kugira ngo ishyire amakuru kuri carrier y'amajwi. Mu gihe cyo guhinduranya, ikimenyetso cy'amashanyarazi (amplitude modulation) gitangira gukoreshwa kuri transducer ya electro-acoustic, igahindura ikimenyetso cy'amashanyarazi mu murima wa ultrasonic. Iyo urumuri runyuze mu buryo bwa acousto-optic, carrier y'amajwi irahinduka kandi ikaba amakuru ajyanye n'imbaraga bitewe n'imikorere ya acousto-optic.

2. Modulator y'amashanyarazi n'amatara(EOM)

Modulator ya electro-optical ni modulator ikoresha ingaruka za electro-optical za kristu zimwe na zimwe za electro-optical, nka kristu za lithium niobate (LiNb03), kristu za GaAs (GaAs) na kristu za lithium tantalate (LiTa03). Ingaruka za electro-optical ni uko iyo voltage ishyizwe kuri kristu ya electro-optical, index ya refractive ya kristu ya electro-optical izahinduka, bigatuma habaho impinduka mu miterere y'urumuri rwa kristu, kandi modulation ya phase, amplitude, intensity na polarization state ya optical signal iragaragara.

Igishushanyo: Imiterere isanzwe ya circuit ya EOM driver

3. Semiconductor Optical Modulator/Semiconductor optique amplifier (SOM/SOA)

Amplifier optique ya semiconductor (SOA) ikoreshwa mu kongera ibimenyetso by'urumuri, ifite ibyiza byo gukoresha chip, ingufu nke, inkunga y'imirongo yose, nibindi, kandi ni ubundi buryo bwo mu gihe kizaza bwo kongera amplifier optique gakondo nka EDFA (Amplifier ya fibre ikoresheje Erbium). Semiconductor optical modulator (SOM) ni igikoresho kimwe na semiconductor optical amplifier, ariko uburyo ikoreshwamo butandukanye gato n'uburyo ikoreshwa na amplifier isanzwe ya SOA, kandi ibimenyetso byibandaho iyo ikoreshejwe nka modulator y'urumuri bitandukanye gato n'ibikoreshwa nka amplifier. Iyo ikoreshejwe mu kongera ibimenyetso by'urumuri, umuyoboro uhoraho uhabwa SOA kugira ngo SOA ikore mu gace k'umurongo; Iyo ikoreshejwe mu guhindura imiyoboro y'urumuri, yinjiza ibimenyetso by'urumuri bihoraho muri SOA, ikoresha imiyoboro y'amashanyarazi kugira ngo igenzure umuyoboro w'urumuri wa SOA, hanyuma ikagenzura imiterere y'umusaruro wa SOA nk'ubwiyongere/ubwiyongere. Ikoresheje imiterere ya SOA amplification na attenuation, ubu buryo bwo guhindura ibintu bwagiye bukoreshwa buhoro buhoro kuri zimwe mu porogaramu nshya, nko kumenya fibre optical, LiDAR, OCT medical imaging n'izindi nzego. Cyane cyane ku bihe bimwe na bimwe bisaba ingano nini, ikoreshwa ry'ingufu n'ikigereranyo cyo kuzimira.

4. Uburyo bwo guhinduranya imirasire ya laser bushobora kandi guhindura ikimenyetso cy’urumuri binyuze mu kugenzura umuvuduko wa laser bias, nk'uko bigaragara ku ishusho iri hepfo, ubugari bwa nanosegonda 3 buboneka binyuze mu guhinduranya imirasire. Bigaragara ko hari uruziga mu ntangiriro y’umuvuduko, ruterwa no kuruhuka kw’icyuma gitwara laser. Niba ushaka kubona uruziga rwa picosegonda zigera ku 100, ushobora gukoresha ubu buryo bwo guhinduranya imirasire. Ariko ubusanzwe ntabwo twifuza kugira ubu buryo bwo guhinduranya imirasire.

Muri make

AOM ikwiriye gukoreshwa mu gutanga ingufu za optique muri watt nke kandi ifite imikorere yo guhindura frequency. EOM yihuta, ariko uburyo bwo gutwara ni bwinshi kandi igipimo cyo kuzimira ni gito. SOM (SOA) ni igisubizo cyiza ku muvuduko wa GHz n'igipimo cyo kuzimira kiri hejuru, hamwe n'ikoreshwa ry'ingufu nke, miniaturization n'ibindi bintu. Diode za laser zigororotse ni zo zihendutse, ariko menya impinduka mu miterere ya spectral. Buri gahunda ya modulation ifite ibyiza n'ibibi byayo, kandi ni ngombwa gusobanukirwa neza ibisabwa mu ikoreshwa mugihe uhitamo gahunda, no kumenya ibyiza n'ibibi bya buri gahunda, no guhitamo gahunda ikwiye. Urugero, mu gupima fibre ikwirakwizwa, AOM isanzwe niyo nyamukuru, ariko muri zimwe mu bishushanyo bishya bya sisitemu, ikoreshwa rya gahunda za SOA ririmo kwiyongera cyane, muri zimwe muri gahunda gakondo za liDAR zikoresha AOM y'ibice bibiri, igishushanyo gishya cya gahunda kugira ngo kugabanya ikiguzi, kugabanya ingano, no kunoza igipimo cyo kuzimira, gahunda ya SOA irakoreshwa. Muri sisitemu y'itumanaho, sisitemu y'umuvuduko muto ikunze gukoresha gahunda ya modulation igororotse, naho sisitemu y'umuvuduko mwinshi ikunze gukoresha gahunda ya electro-optic modulation.