Laser yamphamvu kwambiri yopangidwa ndi MOPA yokhala ndi CHIKWANGWANI chonse

High-mphamvu pulsed laserndi mawonekedwe onse a fiber MOPA

Mitundu yayikulu yamapangidwe a fiber lasers imaphatikizapo resonator imodzi, kuphatikiza kwamitengo ndi zida za master oscillating power amplifier (MOPA). Pakati pawo, mawonekedwe a MOPA akhala amodzi mwa malo omwe akufufuzidwa posachedwa chifukwa chotha kuchita bwino kwambiri.laser pulsedkutulutsa ndi kusinthasintha kwa kugunda kwapakati ndi kubwereza pafupipafupi (kotchedwa pulse wide ndi kubwerezabwereza).

Mfundo yogwirira ntchito ya laser ya MOPA ili motere: The main oscillator (MO) ndi gwero lambewu lochita bwino kwambiri.laser semiconductorzomwe zimapanga kuwala kwa chizindikiro cha mbewu ndi magawo osinthika kudzera mukusintha kwamphamvu kwamphamvu. The Field Programmable gate Array (FPGA) main control imatulutsa ma pulse panopa ndi magawo osinthika, omwe amawongoleredwa ndi ma drive drive kuti agwiritse ntchito gwero la mbewu ndikumaliza kusinthika koyambirira kwa kuwala kwa mbewu. Pambuyo polandira malangizo owongolera kuchokera ku bolodi lalikulu la FPGA, gwero la pampu gwero loyendetsa galimoto limayamba gwero la mpope kuti lipange kuwala kwapampu. Pambuyo pa kuwala kwa mbewu ndi kuwala kwa mpope kuphatikizidwa ndi choboola chamtengo, iwo amabayidwa motsatana mu Yb3 + -doped double-clad optical fiber (YDDCF) mugawo la magawo awiri optical amplification. Panthawiyi, ma Yb3 + ions amatenga mphamvu ya kuwala kwa mpope kuti apange kugawa kwa anthu. Pambuyo pake, kutengera mfundo zoyendera mafunde akukweza komanso kutulutsa kolimbikitsa, kuwala kwa chizindikiro cha mbewu kumapeza mphamvu zambiri mugawo la magawo awiri optical amplification module, pamapeto pake kutulutsa mphamvu yayikulu.nanosecond pulsed laser. Chifukwa chakuchulukirachulukira kwamphamvu, siginecha yokwezeka ya pulse imatha kukhala ndi kupsinjika kwa pulse m'lifupi chifukwa cha kugunda kwamphamvu. M'malo ogwiritsira ntchito, zida zokulitsa masitepe angapo nthawi zambiri zimatengedwa kuti zipititse patsogolo mphamvu zotulutsa komanso kuchita bwino.

The MOPA laser dera dongosolo wapangidwa ndi FPGA chachikulu ulamuliro bolodi, mpope gwero, gwero la mbewu, dalaivala dera bolodi, ndi amplifier, etc. The FPGA waukulu ulamuliro bolodi amayendetsa gwero mbewu linanena bungwe MW-level yaiwisi mbewu kuwala pulses ndi magawo chosinthika ndi kupanga kugunda magetsi zizindikiro ndi chosinthika waveforms, pulse00005 (3) 900 kHz). Chizindikirochi chimalowetsedwa kudzera pa chodzipatula ku gawo la magawo awiri opangira mawonekedwe opangidwa ndi preamplifier ndi amplifier yayikulu, ndipo pamapeto pake imatulutsa laser yamphamvu kwambiri yamphamvu kwambiri kudzera pa optical isolator yokhala ndi ntchito yolumikizana. Gwero la mbewu lili ndi chowunikira chamkati kuti chiwunikire mphamvu yotulutsa munthawi yeniyeni ndikubwezeretsanso ku board yayikulu ya FPGA. Gulu lalikulu lowongolera limawongolera mabwalo oyendetsa pampu 1 ndi 2 kuti akwaniritse ntchito yotsegulira ndi kutseka kwa magwero a pampu 1, 2 ndi 3.Photodetectorimalephera kuzindikira kuwala kwa chizindikiro, bolodi lalikulu lolamulira lidzatseka gwero la mpope kuti liteteze kuwonongeka kwa YDDCF ndi zipangizo zamagetsi chifukwa chosowa kuwala kwa mbewu.

Njira ya MOPA laser optical path imatenga mawonekedwe a ulusi wonse ndipo imakhala ndi gawo lalikulu la oscillation ndi gawo la magawo awiri okulitsa. Gawo lalikulu la oscillation limatenga semiconductor laser diode (LD) yokhala ndi kutalika kwapakati kwa 1064nm, kutalika kwa 3nm, ndi mphamvu yopitilira 400mW ngati gwero la mbewu, ndikuphatikiza ndi fiber Bragg grating (FBG) yokhala ndi chiwonetsero cha 99. kupanga dongosolo la kusankha mafunde. Gawo la 2-stage amplification module limagwiritsa ntchito mawonekedwe a mpope, ndipo YDDCF yokhala ndi mainchesi apakati a 8 ndi 30μm amasinthidwa motsatana ngati media media. The lolingana ❖ kuyanika mpope mayamwidwe coefficients ndi 1.0 ndi 2.1dB/m@915nm, motero.