LONG-WAVELENGTH INGAASP/INP DISTRIBUTED FEEDBACK LASERS INCORPORATING GAIN-COUPLED MECHANISM

被引：51

作者：

TSANG, WT ^{[1
]}

CHOA, FS ^{[1
]}

WU, MC ^{[1
]}

CHEN, YK ^{[1
]}

LOGAN, RA ^{[1
]}

SERGENT, AM ^{[1
]}

BURRUS, CA ^{[1
]}

机构：

[1] AT&T BELL LABS,CRAWFORD HILL,NJ 07733

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 1992年 / 4卷 / 03期

关键词：

D O I：

10.1109/68.122369

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We demonstrate successful operation of long-wavelength InGaAsP low-threshold-current gain-coupled DFB lasers. This is accomplished by using a InGaAsP quaternary grating that absorbs the DFB emission. The amount of gain (loss)-coupling is controlled by the composition (bandgap) and thickness of the grating quaternary, and the InP-spacer layer between the grating and the active layer. With optimally designed lasers, CW threshold currents were 10-15 mA (250-mu-m cavity, as-cleaved), slope efficiency of approximately 0.4 mW/mA (both facets) and SMSR was as high as 52 dB. The laser operated in the same DFB mode with SMSR staying approximately 50 dB throughout the entire current range. At 100-degrees-C, the CW threshold current stayed low, approximately 50 mA, and SMSR was approximately 40 dB. Results also indicate that the presence of gain-coupling removes the degeneracy in lasing wavelength.

引用

页码：212 / 215

页数：4

共 21 条

[1]

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[2]

BUSS J, 1985, ELECTRON LETT, V21, P179

[3] GAIN-COUPLED DFB LASERS VERSUS INDEX-COUPLED AND PHASE-SHIFTED DFB LASERS - A COMPARISON BASED ON SPATIAL HOLE BURNING CORRECTED YIELD [J].