Nheyo yekushanda kwe semiconductor laser

Musimboti wekushanda welaser ye semiconductor

Chekutanga pane zvese, zvinodiwa zveparamende zve semiconductor lasers zvinounzwa, kunyanya zvinosanganisira zvinhu zvinotevera:
1. Kushanda kwe Photoelectric: kusanganisira chiyero chekupera, dynamic linewidth nezvimwe zviyero, zviyero izvi zvinokanganisa zvakananga mashandiro ema semiconductor lasers mumasisitimu ekutaurirana.
2. Zvimiro zvechivakwa: zvakaita sehukuru hunopenya uye kurongeka, tsananguro yemagumo ekubvisa, saizi yekuisa uye saizi yemufananidzo.
3. Kureba kweWavelength: Hurefu hwewavelength hwe semiconductor laser i650 ~ 1650nm, uye kururama kwacho kwakanyanya.
4. Muganho wemagetsi (Ith) uye muganho wemagetsi (lop): Aya ma parameter anosarudza mamiriro ekutanga uye mamiriro ekushanda kwe semiconductor laser.
5. Simba nemagetsi: Nekuyera simba, magetsi nemagetsi e semiconductor laser iri kushanda, ma PV, PI ne IV curves anogona kukwezvwa kuti anzwisise hunhu hwawo hwekushanda.

Musimboti wekushanda
1. Mamiriro ekuwana: Kugoverwa kwemagetsi anochinja-chinja munzvimbo inochinja-chinja (nzvimbo inoshanda) kunosimbiswa. Mu semiconductor, simba remaerekitironi rinomiririrwa nematanho esimba anotevedzana. Nokudaro, huwandu hwemaerekitironi ari pasi pebhendi rekufambisa musimba rakakwirira hunofanira kunge hwakakura kupfuura huwandu hwemaburi ari pamusoro pebhendi rekufambisa musimba rakaderera pakati penzvimbo mbiri dzebhendi remagetsi kuti uwane kuchinja kwenhamba yezvikamu. Izvi zvinoitwa nekushandisa mukana wakanaka kune homojunction kana heterojunction uye kuisa maerekitironi anodiwa muchikamu chinoshanda kuti kuwedzere maerekitironi kubva kubhendi repasi rekufambisa simba kuenda kubhendi repamusoro rekufambisa simba. Kana huwandu hwakawanda hwemaerekitironi mudunhu rehuwandu hwezvikamu zvakapindurwa hukabatanazve nemaburi, kubuda kwesimba kunoitika.
2. Kuti iwane mwaranzi yakabatana yakakurudzirwa, mwaranzi yakakurudzirwa inofanira kudzorerwa kakawanda mu optical resonator kuti igadzire laser oscillation, resonator yelaser inoumbwa ne natural cleavage surface ye semiconductor crystal segirazi, inowanzo putirwa pamucheto wechiedza ne high reflection multilayer dielectric film, uye smooth surface inoputirwa ne reflection film yakaderedzwa. Kune Fp cavity (Fabry-Perot cavity) semiconductor laser, FP cavity inogona kuvakwa zviri nyore nekushandisa natural cleavage plane yakatarisana ne pn junction plane ye crystal.
(3) Kuti igadzire oscillation yakasimba, laser medium inofanira kukwanisa kupa gain yakakura zvakakwana kuti itsigire kurasikirwa kwemaziso kunokonzerwa ne resonator uye kurasikirwa kunokonzerwa ne laser output kubva pamusoro pe cavity, uye kugara ichiwedzera light field mu cavity. Izvi zvinofanira kuva ne injection yakasimba yakakwana, kureva kuti, pane particle number inversion yakakwana, kana dhigiri re particle number inversion rakakwirira, gain yakakura, kureva kuti, chinodiwa chinofanira kusangana nemamiriro e current threshold. Kana laser yasvika pa threshold, chiedza chine wavelength chaiyo chinogona kurira mu cavity uye kuwedzerwa, uye pakupedzisira kugadzira laser uye continuous output.

Zvinodiwa pakuita basa
1. Kuchinja bandwidth uye mwero: malaser e semiconductor uye tekinoroji yavo yekuchinja zvinhu zvakakosha mukutaurirana kwe optical kusina waya, uye bandwidth uye mwero wekuchinja zvinhu zvinokanganisa zvakananga kunaka kwekutaurirana. Laser yakagadziriswa mukati (Internal modulated lasers)laser yakagadziriswa zvakananga) yakakodzera minda yakasiyana-siyana mukukurukurirana kwefiber ye optical nekuda kwekutumira kwayo nekukurumidza uye mutengo wakaderera.
2. Hunhu hweSpectral uye hunhu hwemodulation: Semiconductor distributed feedback lasers (Laser yeDFB) dzave sosi yechiedza chakakosha mukukurukurirana kwefiber ye optical uye kutaurirana kwe optical muchadenga nekuda kwehunhu hwavo hwakanaka hwe spectral uye hunhu hwe modulation.
3. Mutengo nekugadzirwa kwemagetsi akawanda: Malaser eSemiconductor anofanirwa kuve nemabhenefiti ekugadzirwa kwemagetsi kwakaderera uye kwakawanda kuti agutse zvinodiwa pakugadzirwa kwemagetsi nemashandisirwo makuru.
4. Kushandiswa kwesimba uye kuvimbika: Muzviitiko zvekushandisa zvakaita senzvimbo dzedata, semiconductor lasers inoda kushandiswa kwesimba kushoma uye kuvimbika kwakanyanya kuti ive nechokwadi chekuti inoshanda kwenguva refu.