Rof Electro-optic modulator 850 nm electro optic intensity modulator 10G

Matsakaicin ƙarewar DC na Maxim

A cikin wannan gwajin, ba a yi amfani da siginar RF a tsarin ba. An auna ƙarfin DC mai tsabta.
1. Hoto na 5 yana nuna ƙarfin gani na fitowar modulator, lokacin da aka sarrafa modulator a wurin kololuwa. Yana nuna 3.71dBm a cikin zane.
2. Hoto na 6 yana nuna ƙarfin gani na fitowar modulator, lokacin da aka sarrafa modulator a wurin Null. Yana nuna -46.73dBm a cikin zane. A cikin gwaji na gaske, ƙimar ta bambanta a kusa da -47dBm; kuma -46.73 ƙimar da ta dace ce.
3. Saboda haka, daidaitaccen rabon ƙarewar DC da aka auna shine 50.4dB.

Bukatun don babban rabon ƙarewa

1. Mai daidaita tsarin dole ne ya kasance yana da babban rabon ƙarewa. Halayen mai daidaita tsarin yana yanke shawarar matsakaicin rabon ƙarewa da za a iya cimmawa.
2. Za a kula da rabuwar hasken shigarwar modulator. Masu daidaitawa suna da saurin rabuwar. Daidaitaccen rabuwar na iya inganta rabon ɓacewa sama da 10dB. A cikin gwaje-gwajen dakin gwaje-gwaje, yawanci ana buƙatar mai sarrafa rabuwar.
3. Masu kula da bias masu kyau. A cikin gwajinmu na rabon karewa na DC, an cimma rabon karewa na 50.4dB. Duk da cewa takardar bayanai ta masana'antar mai gyara ta lissafa 40dB kawai. Dalilin wannan ci gaban shine cewa wasu masu gyara suna tafiya da sauri sosai. Masu kula da bias na Rofea R-BC-ANY suna sabunta ƙarfin bias a kowane daƙiƙa 1 don tabbatar da amsawar hanya cikin sauri.