 |
| Operation of semiconductor laser Amplifier |
Hi this stuff describes about semiconductor laser Amplifiers,
and I think you will get idea about its operation.
These SLA (semiconductor laser Amplifier) are based on semiconductor
laser diode (SLD). This figure shows us a semiconductor laser amplifier with
length l, thickness. This active region is having excited electrons and when
they force to come to ground level, amplification process occurs. Here facet reflectivity
is in between 30% and 35%. We can generalize the structure of a SLA by an
embedded active region with two end-facets for the input and output of light
signals. The
end-facets with power reflection coefficients (R1 and R2)
are
responsible for providing optical feedback into the amplifier. These finite
reflections arise because of the discontinuities of the refractive index
between the semiconductor and air. When the signal passes through active region of gain G, it will
boost up.
Advantages
of integrated optical amplifiers
Integrated
optical amplifiers have the advantage of integrating with other guided wave
devices such as power dividers leading to compensation of waveguide losses.
And also
optical switches associated with integrated optical amplifiers are capable of
providing loss less switching and it will reduce the cross talk.
Throughout this article I hope you may get some thing. This provides very basic explanation and future will cover more. Comments are well come. Thank you.
No comments:
Post a Comment