50 GHz spacing, multi-wavelength tunable locker integrated in a transmitter module with a monolithic-modulator and a DFB-laser

2002 ◽  
Author(s):  
K. Tatsuno ◽  
M. Shirai ◽  
H. Furuichi ◽  
K. Kuroguchi ◽  
N. Baba ◽  
...  
Keyword(s):  
Wavelength Tunable ◽  
Multi Wavelength ◽  
Dfb Laser

DFB Lasers with Tilted Waveguide for Multi-Wavelength Generation

2007 ◽  
Vol 31 ◽  
pp. 36-38 ◽  
Author(s):  
Lip Fah Chong ◽  
Jing Hua Teng ◽  
Ee Leong Lim ◽  
Norman Soo Seng Ang ◽  
J.R. Dong ◽  
...  
Keyword(s):  
Single Mode ◽  
Distributed Feedback ◽  
Couple Mode ◽  
Threshold Condition ◽  
Couple Mode Theory ◽  
Gain Margin ◽  
Ridge Waveguides ◽  
Multi Wavelength ◽  
Dfb Laser ◽  
Lasing Frequency

In this paper, we present the theoretical investigation of index-coupled distributed feedback (DFB) laser with tilted single mode ridge waveguides. By tilting part of the ridge waveguide in various degrees, DFB laser with manifold effective grating periods can be realized. The structure is analyzed using couple mode theory in matrix form based on threshold analysis. Important parameters of DFB laser like resonant frequency and threshold gains are obtained by solving the eigen-equation. The results indicate not only that the lasing frequency is modulated by the waveguide titling angle, but also large Gain Margin (GM) can be achieved at the threshold condition which enhance the stable single mode operation in index-coupled DFB laser.

scholarly journals Self-Aligned Emission of Distributed Feedback Lasers on Optical Fiber Sidewall

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2381
Author(s):  
Tianrui Zhai ◽  
Xiaojie Ma ◽  
Liang Han ◽  
Shuai Zhang ◽  
Kun Ge ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Coupling Effect ◽  
Wave Theory ◽  
Dip Coating ◽  
Distributed Feedback ◽  
Power Delivery ◽  
Fiber Axis ◽  
Fiber Waveguide ◽  
Multi Wavelength ◽  
Dfb Laser

This article assembles a distributed feedback (DFB) cavity on the sidewalls of the optical fiber by using very simple fabrication techniques including two-beam interference lithography and dip-coating. The DFB laser structure comprises graduated gratings on the optical fiber sidewalls which are covered with a layer of colloidal quantum dots. Directional DFB lasing is observed from the fiber facet due to the coupling effect between the grating and the optical fiber. The directional lasing from the optical fiber facet exhibits a small solid divergence angle as compared to the conventional laser. It can be attributed to the two-dimensional light confinement in the fiber waveguide. An analytical approach based on the Bragg condition and the coupled-wave theory was developed to explain the characteristics of the laser device. The intensity of the output coupled laser is tuned by the coupling coefficient, which is determined by the angle between the grating vector and the fiber axis. These results afford opportunities to integrate different DFB lasers on the same optical fiber sidewall, achieving multi-wavelength self-aligned DFB lasers for a directional emission. The proposed technique may provide an alternative to integrating DFB lasers for applications in networking, optical sensing, and power delivery.

1.3-μm multi-wavelength DFB laser array fabricated by mocvd selective area growth

2014 ◽  
Vol 331 ◽  
pp. 165-168 ◽  
Author(s):  
Fei Guo ◽  
Ruikang Zhang ◽  
Dan Lu ◽  
We Wang ◽  
Chen Ji
Keyword(s):  
Selective Area Growth ◽  
Laser Array ◽  
Selective Area ◽  
Area Growth ◽  
Multi Wavelength ◽  
Dfb Laser

Packaging and testing of multi-wavelength DFB laser array using REC technology

2014 ◽  
Vol 312 ◽  
pp. 123-126 ◽  
Author(s):  
Yi Ni ◽  
Xuan Kong ◽  
Xiaofeng Gu ◽  
Xiangfei Chen ◽  
Guanghui Zheng ◽  
...  
Keyword(s):  
Laser Array ◽  
Multi Wavelength ◽  
Dfb Laser
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