Design a double heterojunction laser on a gaas

Assignment Help Physics

Reference no: EM133437724

Modern Photonics

Picture below shows a double heterojunction laser designed for emission at 1.5 mm wavelength, which we have discussed in detail in class.

310_Modern Photonics.jpg

Problem 1.
Design a double heterojunction laser on a GaAs substrate for emission near 830 nm wavelength using active layer thickness of 0.2 mm. Provide the following:
The dimensions (which can be similar to Fig. 1, but need to be justified)
The layer structure, meaning
You will need AlxGa1--xAs for carrier confinement and guiding layers. What mole fraction, x, do you choose and why?
What will be the thickness of these layers. (You should choose the thickness that confines light in this waveguide)
What will be the approximate doping concentration of the n+ and p+ layers?

Problem 2.
Calculate/estimate the threshold current of the laser you have designed. Assume: length l= 400 mm; Reflectivities R1 = R2 =0.9; Cavity Loss g = 103 cm--1, internal quantum efficiency hi=0.9, and light confinement factor G=0.9.

Reference no: EM133437724

Questions Cloud

Why religion still plays a strong part in american lives : A DISCUSSION ON why religion still plays a strong part in American lives and politics

Examine the rates of prostate cancer : Examine the rates of prostate cancer by year between 1975 and 2017. Is there a pattern to th change in the rates overtime?

Why is effective management of a healthcare crisis important : Why is effective management of a healthcare crisis important? Consider both functional and enterprise-wide impacts when answering the question.

Discuss what the world health organization : In your introduction, discuss what the World Health Organization (WHO) is. What is the purpose and mission of the WHO? What are some of the areas of health

Design a double heterojunction laser on a gaas : Design a double heterojunction laser on a GaAs substrate for emission near 830 nm wavelength using active layer thickness of 0.2 mm

How do you see applying them in your business career : Identify and explain, in your own words, one concept/theory/idea from each chapter's videos. In your own words, why did you choose these concepts/theories

Identify at least one area of grammar or punctuation : Identify at least one area of grammar or punctuation in which you think you have room for improvement. How could you work towards the goal of improving in this

Describe the different survey methods and how they are used : Describe the different survey methods and how they are used. What human biases affect risk identification of extreme risks? Why use a premortem workshop?

How does an infinitely or indefinitely repeated prisoner : How does an infinitely or indefinitely repeated Prisoner's Dilemma game differ from a finitely repeated or one-time game? Review the Prisoner Dilemma game from

User Account

All Pages