郭成光电子展示2.

1、Topic: High Speed directly modulation VCSEL working at 1.5m Speaker: Guo Cheng Teacher: Prof. Yang Tianxin Outline 2Development of high speed modulation VCSEL 1Directly Modulation Semiconductor laser 3The structure and principle of 1.5m VCSEL 4The performance of this VCSEL 1.Directly modulation semi

2、conductor laser Definition: Modulate the laser output by changing injection current. Advantage: Simple structure No need for accessory modulation module. Defection: High speed modulation lead to large chirping rate which make the working frequency broadening. 2.Development of high speed VCSEL for 98

3、0nm and 850nm 1550nm VCSEL is difficult to exceed 14GHz before 2013 Single-Mode 1.5-m VCSELs with 22-GHz Small-Signal Bandwidth Advantages of VCSEL in high-speed applications Cost effectiveness Energy efficiency Small footprint Integrity Feature: Operating at C-band Single mode ouput Room temperatur

4、e operation High modulation speed22GHz Low power consumption10mW Walter Schottky Institute, Germany SC-BTJ-VCSEL Structure 3.The structure and principle of 1.5m VCSEL a-gain p-photonic lifetime Heat Distribution Decide fp Type3-m4-m Threshold current0.7 mA 0.9 mA Maximum power1.5 mW 2.3 mW SMSR46 dB 37 dB 4.The performance of this VCSEL Type3-m4-m Modulation bandwidth21.5GHz