Zokhudza MOPA

MOPA (Master Oscillator Power Amplifier) ​​ndi kapangidwe ka laser komwe kamawonjezera magwiridwe antchito pogawa gwero la mbewu (master oscillator) kuchokera ku gawo la mphamvu yokulitsa. Lingaliro lalikulu limaphatikizapo kupanga chizindikiro cha pulse cha mbewu chapamwamba kwambiri ndi master oscillator (MO), chomwe chimakwezedwa mphamvu ndi power amplifier (PA), pamapeto pake chimapereka ma pulse a laser amphamvu kwambiri, apamwamba kwambiri, komanso olamulidwa ndi magawo. Kapangidwe kameneka kamagwiritsidwa ntchito kwambiri popanga mafakitale, kafukufuku wasayansi, komanso ntchito zachipatala.

1.Ubwino Waukulu wa MOPA Amplification

①Magawo Osinthasintha ndi Otha Kuwongolera:

- Kuchuluka kwa Kugunda Kosinthika Kokha:

Kukula kwa kugunda kwa mtima kwa kugunda kwa mtima kwa mbeu kumatha kusinthidwa mosasamala kanthu za gawo la amplifier, nthawi zambiri kuyambira 1 ns mpaka 200 ns.

- Kuchuluka Kobwerezabwereza Kosinthika:

Imathandizira mitundu yosiyanasiyana ya ma pulse repetition rates, kuyambira ma single-shot mpaka ma MHz-level high-frequency pulses, kuti ikwaniritse zosowa zosiyanasiyana zokonzera (monga, high-speed marking ndi deep engraving).

②Ubwino Wapamwamba wa Beam:
Makhalidwe a phokoso lochepa a gwero la mbewu amasungidwa pambuyo pokulitsa, zomwe zimapangitsa kuti kuwala kwa dzuwa kukhale kochepa (M² < 1.3), koyenera kupangidwa mwaluso.

③Mphamvu Yaikulu Yogunda ndi Kukhazikika:
Ndi kukulitsa kwa magawo ambiri, mphamvu ya kugunda kwa mtima kamodzi imatha kufika pamlingo wa millijoule ndi kusinthasintha kochepa kwa mphamvu (<1%), komwe ndi koyenera kugwiritsidwa ntchito m'mafakitale olondola kwambiri.

④Kukonza Kozizira:
Ndi kutalika kwafupipafupi kwa pulse (monga, mu nanosecond range), zotsatira za kutentha pa zinthu zimatha kuchepetsedwa, zomwe zimathandiza kuti zinthu zosweka monga galasi ndi ziwiya zadothi zigwiritsidwe ntchito bwino.

2. Master Oscillator (MO):

MO imapanga ma pulse a mbewu omwe ali ndi mphamvu zochepa koma olamulidwa bwino. Gwero la mbewu nthawi zambiri limakhala la semiconductor laser (LD) kapena laza ya fiber, yomwe imapanga ma pulse kudzera mu modulation yolunjika kapena yakunja.

3.Chokulitsa Mphamvu (PA):

PA imagwiritsa ntchito ma amplifiers a fiber (monga ytterbium-doped fiber, YDF) kuti iwonjezere mphamvu ya pulse m'magawo angapo, zomwe zimawonjezera mphamvu ya pulse ndi mphamvu yapakati. Kapangidwe ka amplifier kuyenera kupewa zotsatira zosalunjika monga stimulated Brillouin scattering (SBS) ndi stimulated Raman scattering (SRS), pomwe ikusungabe kuwala kwapamwamba.

MOPA vs. Traditional Q-Switched Fiber Lasers