Firstly, the thesis analyzes the availability and advantage of the Five-Level Neutral-Point-Clamped Inverter ("FNI" for abbreviation) for the switching power amplifier.
Based on the ring shaped laser diode array side pumped Nd∶YLF high gain amplifier and the conventional plan concave resonator, a simple structure single longitudinal mode single pulse Q switched oscillator is demonstrated by taking advantages of mode selecting property of passive Q switches (Cr 4+ ∶YAG crystal) and etalons (formed by two end of uncoated Nd∶YLF rod).
This paper analyses the principle of the bloelectric amplifier with the isolated stage of amplification,gives the main ratings of the thick film modules of amplification,introduces how to connect them and discusses the design of the bioelectric amplifer with the magnetic isolated stage and light isolated stage.
In the paper, a 34Mb/s hybrid integrated optical repeater is designed and made. The repeater contains four modules which used hybrid integrated thick-film circuit. The former amplifier module for optical receiver is integrated on a 10 × 15mm2 ceramic substrate and mounted in a 6-pin metal package. The AGC circuit and main amplifier module are integrated on a 26 × 37mm2 ceramic substrate and mounted in a 48-pin metal package. The timing extraction module is integrated on a 15× 27mm2 ceramic substrate and mounted...
In the paper, a 34Mb/s hybrid integrated optical repeater is designed and made. The repeater contains four modules which used hybrid integrated thick-film circuit. The former amplifier module for optical receiver is integrated on a 10 × 15mm2 ceramic substrate and mounted in a 6-pin metal package. The AGC circuit and main amplifier module are integrated on a 26 × 37mm2 ceramic substrate and mounted in a 48-pin metal package. The timing extraction module is integrated on a 15× 27mm2 ceramic substrate and mounted in a 24-pin metal package, and LED driver module is integrated on a 10 × 15mm2 ceramic substrate.The receiving sensitivity of the optical repeater is less than-34 dBm (BER= 10-9) and eye pattern is clear. The size of tile whole device is 145 × 76 × 44mm3.
A co-pumped Erbium-Doped Fiber Amplifier(EDFA) which consists of homemade 1480 nm pigitaled LD's and erbium doped fiber (EDF)has been developed.A smallsignal gain of 32 dB of the EDFA has been obtained (fiber to fiber net gain is 27 dB).Thesaturation power and maximum power of fiber are 2.5 dBm and 10 dBm, respectively,while the gain bandwidth is greater than 25 nm.The gain and bandwidth characteristics ofthe EDFA are studied.Effects of Amplified Spontenous Emission (ASE) on measurementare discussed.