Muyeso wa m'lifupi mwa laser

Muyeso wa m'lifupi mwa laser
Pali njira zambiri zoyezeram'lifupi mwa mzere wa laser:
1. Pamene mzere wa laser uli waukulu (> 10 GHz, pamene ma modes angapo akugwedezeka mu ma resonator angapo a laser), ma spectrometer achikhalidwe omwe amagwiritsa ntchito ma diffraction gratings angagwiritsidwe ntchito poyesa. Komabe, njira iyi ndi yovuta kupeza resolution yapamwamba kwambiri.
2. Njira ina ndikugwiritsa ntchito chosiyanitsa ma frequency kuti musinthe ma frequency fluctuation kukhala intensity fluctuation. Chosiyanitsacho chingakhale unbalanced interferometer kapena high-precision reference cavity. Resolution ya njira yoyezera iyi nayonso ndi yochepa.
3. Ma laser a single-frequency nthawi zambiri amagwiritsa ntchito njira ya heterodyne, yomwe imalemba kuchuluka kwa ma frequency a laser output ndi kuchuluka kwake pambuyo pa offset ndi delay.
4. Pa mizere yopingasa ya ma hertz mazana angapo, njira yachikhalidwe ya heterodyne ndi yovuta kugwiritsa ntchito chifukwa cha kufunika kwa kutalika kwakukulu kwa kuchedwa. Lupu ya ulusi wozungulira ndi amplifier yomangidwa mkati ingagwiritsidwe ntchito kukulitsa kutalika kwa kuchedwa.
5. Mwa kujambula kuchuluka kwa ma kugunda kwa ma laser awiri odziyimira pawokha, mutha kupeza resolution yapamwamba kwambiri. Pankhaniyi, phokoso la laser yowunikira ndi lotsika kwambiri kuposa lalaser yoyezedwa, kapena zizindikiro zawo zogwirira ntchito ndizofanana. Ma loops otseka kapena njira zozikidwa pa kujambula masamu kuti awerengere kusiyana kwa ma frequency nthawi yomweyo zingagwiritsidwe ntchito. Njirayi ndi yosavuta komanso yokhazikika, koma imafuna laser ina (yokhala ndi ma frequency pafupi ndilaser yoyezedwaNgati mzere woyezedwa ukufuna kuti ukhale ndi ma spectral osiyanasiyana, chisa cha ma frequency chimakhala chosavuta kugwiritsa ntchito.
Kuyeza ma frequency optical nthawi zambiri kumafuna kupereka ma frequency enieni (kapena nthawi) pamalo enaake.ma laser opapatiza okhala ndi mzere wopapatiza, pamafunika kuwala kofanana kokha kuti pakhale kuwala kolondola kokwanira. Njira ya heterodyne imapeza kuwala kofananako mwa kugwiritsa ntchito kuchedwa kwa nthawi yayitali pa chipangizo choyesera chokha. Mwanjira yabwino, mgwirizano wa nthawi pakati pa kuwala koyambirira ndi kuwala kwake kochedwa uyenera kupewedwa. Chifukwa chake, ulusi wautali wa kuwala nthawi zambiri umagwiritsidwa ntchito. Komabe, chifukwa cha kusinthasintha kokhazikika ndi zotsatira za mawu, ulusi wautali wa kuwala umayambitsa phokoso lowonjezera la gawo.