双电极半导体光放大器的放大自发辐射谱和增益特性的实验研究.pdfVIP

Vol. 32,No. 6 JournalofSemiconductors June2011 Amplifiedspontaneousemissionspectrumandgaincharacteristicofatwo-electrode semiconductoroptical amplifier WangHanchao(汪寒超),Huang Lirong(黄黎蓉) ,and Shi Zhongwei(石忠卫) WuhanNationalLaboratoryforOptoelectronics,CollegeofOpto-ElectronicsScienceEngineering,HuazhongUniversityof Science Technology,Wuhan430074, China Abstract: A two-electrode multi-quantum-well semiconductor optical amplifier is designed and fabricated. The amplified spontaneous emission (ASE) spectrum and gain were measured and analyzed. It is shown that the ASE spectrumandgaincharacteristicaregreatlyinfluencedbythedistributionoftheinjectioncurrentdensity.Bychang- ing the injection current density of two electrodes, the full width at half maximum, peak wavelength, peak power of theASEspectrum and the gain characteristic can be easily controlled. Keywords: semiconductoropticalamplifier(SOA);currentdensity;amplifiedspontaneousemission(ASE);gain characteristic DOI: 10.1088/1674-4926/32/6/064010 PACC: 4280S;6855;4285F acteristic of a two-electrode SOA can be easily controlled by 1. Introduction adjustingtheinjection current density of the two electrodes. Semiconductor optical amplifiers (SOAs) have been 2. Device structureandexperimental detail widely used as inline amplifiers, wavelength converters and optical regeneration devices in optical communication sys- Unlike a common SOA, as shown in Fig. 1(a), which has tems. In these linear or nonlinear applications, the gain spec- only one electrode and a unif