Kuyerwa kwehupamhi hwemutsetselaser yakamanikana ine upamhi hwemutsara
Upamhi hwelaser ine upamhi hwemutsara mutete, kunyanya hwemalaser ane frequency imwe chete, hunoreva upamhi hwelaser spectrum (kazhinji hafu yeupamhi kusvika kuhupamhi hwakazara hweFWHM). Zvakanyatsojeka, upamhi hwesimba respectral density yemagetsi ane radiated hunoratidzwa maererano nefrequency, wavenumber kana wavelength. Upamhi hwemutsara welaser hune hukama hwapedyo nenguva uye hunoratidzwa nenguva yekubatana uye urefu hwekubatana. Kana chikamu chikachinja zvisina muganho, ipapo ruzha rwechikamu runogadzira linewidth, izvo zvinoitika kune free oscillator. Kuchinja kwechikamu kwakavharirwa mukati mechikamu chidiki kwazvo kunoguma ne 0 linewidths uye imwe noise sideband. Kubviswa kwehurefu hwe resonant cavity kunobatsirawo kuhupamhi hwemutsara uye kunoita kuti huve zvichienderana nenguva yekuyera. Izvi zvinoratidza kuti upamhi hwemutsara chete kana chimiro chespectrum (rudzi rwemutsara) hazvigone kupa ruzivo rwese nezvelaser spectrum.
Nzira dzakawanda dzinogona kushandiswa kuyeraupamhi hwemutsara welaser:
Kana chiyero chehupamhi hwemutsara chakakura (>10GHz, kana paine kutenderera kwemaitiro akawanda mumakona e resonant ema lasers akawanda), spectrometer yechinyakare inoshandisa diffraction grating inogona kushandiswa pakuyera. Zvakaoma zvikuru kuwana high frequency resolution nekushandisa nzira iyi.
Imwe nzira ndeyekushandisa frequency discriminator kushandura frequency fluctuations kuita intensity fluctuations. Discriminator inogona kuva unbalanced interferometer kana high-precision reference cavity. Resolution yeiyi measurement method yakaganhurirwawo zvikuru.
3. MaLaser ane mafrequency maviri anowanzo shandisa nzira yekuzviitira yega, iyo inorekodha kurova pakati pemabudiro eLaser neayo pachayo mushure mekudzima mafrequency nekunonoka.
Kana upamhi hwemutsetse huri mazana akati wandei eHertz, nzira yechinyakare ye heterodyne haishande nekuti kureba kukuru kwekunonoka kunodiwa panguva ino. Chinotenderera chefiber loop uye internal fiber amplifier zvinogona kushandiswa kuiwedzera.
5. Kukwanisa kuwana resolution yepamusoro-soro kunogona kuwanikwa nekunyora kurova kwema laser maviri akazvimiririra. Panguva ino, ruzha rwe reference laser rwakaderera zvikuru pane rwe test.laser, kana kuti zviratidzo zvekushanda kwezviviri zvakafanana. Musiyano wefrequency instantaneous unogona kuwanikwa nekushandisa phase-locked loop kana kuburikidza nekuverenga zvichibva pane zvinyorwa zvemasvomhu. Nzira iyi iri nyore uye yakagadzikana, asi inoda imwe laser (inoshanda pedyo nefrequency ye test laser). Kana upamhi hwemutsara wakayerwa huchida nzvimbo yakakura kwazvo yespectral, zviri nyore kushandisa frequency comb.
Kuyerwa kwemafrequency ekuona kunowanzoda kutariswa kwemafrequency (kana nguva) pane imwe nguva. Kune laser ine upamhi hwemutsara mutete, chiedza chimwe chete chekutarisa chinodiwa kuti chipe referensi yakakwana. Nzira yeheterodyne inowana referensi yemafrequency nekushandisa kunonoka kwenguva yakareba zvakakwana kubva pamudziyo wekuyedza pachawo. Zvakanaka, inodzivisa kubatana kwenguva pakati pemwenje wekutanga nechiedza chayo chinononoka. Naizvozvo, fiber dzemaziso refu dzinowanzo shandiswa. Zvisinei, nekuda kwekuchinja-chinja kwakagadzikana uye mhedzisiro yeacoustic, fiber dzemaziso refu dzinogona kukonzera ruzha rwekuwedzera.
Nguva yekutumira: Zvita-08-2025