Ndi laser yotetezeka m'maso yokhala ndi kutalika kwa 1535nm.Ili ndi mawonekedwe a voliyumu yaying'ono, kugwiritsa ntchito mphamvu zochepa, kudalirika kwakukulu komanso kukhazikika kwabwino, mitundu yosiyanasiyana ya kutentha, yomwe imatsimikizira kuti ndi laser yotetezeka, yogwira ntchito komanso yokhazikika yotetezedwa ndi maso.
Imatengera LD pumped erbium laser yokhala ndi 1.4 ~ 2.0μm diso lotetezeka lotulutsa kutalika kwa mawonekedwe, mawonekedwe ake owoneka bwino ali pafupi ndi malire a mtengo wa diffraction.