Question: 1. The threshold current density for a stripe geometry AlGaAs laser is 3500 A/cm'at 15 C. Determine the threshold current at 60C when the threshold

1. The threshold current density for a stripe geometry AlGaAs laser is 3500 A/cm'at 15 °C. Determine the threshold current at 60°C when the threshold temperature coefficient for the device is 180 K and the contact stripe is 20x100 pm.

2. The coated mirror reflectivity at either end of a 350 um optical cavity of an injection laser is 0.5 and 0.7. At the normal operating temperature of 300 K the threshold current density for the device is 2 kA/cm and the gain factor is 22x10 cm/A. Determine the loss coefficient of the optical cavity.

Step by Step Solution

★★★★★

3.44 Rating (154 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Physics Questions!

The exchange current density for a PtIFe3+,Fel+ electrode is 2.5 mA cm-I. The standard potential of the electrode is +0.77 V. Calculate the current flowing through an electrode of surface area 1.0...

What is the coefficient of O2 ? 5 O 10 11 O 4 FeS2 + 02 --> - Fe2O3 + SO2 -

A common optical instrument in a laser laboratory is a beam expander. One type of beam expander is shown in FIGURE P35.28. The parallel rays of a laser beam of width w 1 enter from the left. a. For...

1. Mercury Company has the following opening account balances in its subsidiary ledgers on May 1 and uses the periodic inventory system. All ledger accounts have normal debit and credit balances. The...

I need some help on the ledger portion of this assignment. Any help would be appreciated. The Texas Company This project will give you an opportunity to apply your knowledge of accounting principles...

Do question 4 for JAN 2013 and question 3 and 4 for July 2012.This module is income tax for singapore.Do it in microsoft word. ACC213 Examination - January Semester 2013 Introduction to Income Tax...

1. The condensed income statement for a business for the past year is presented as follows: Sales Less variable costs Contribution margin Less fixed costs Income (loss) from oper. $300,000 180.000...

During testing, she always hangs a sign on the door communicating that she does not wish to be disturbed. She reads the instructions verbatim and asks her students if they have any questions prior tc...

1. The summarized financial statements for the year ended 31 December 2020 for Ayah Bhd. and Anak Bhd. are as follows: (a) Statements of profit or loss for the year ended 31 December 2020 Ayah Bhd....

See the University of Maine System Annual Financial Report: Statement of Net Position (Balance Sheet) on page 28; and Statement of Revenues, Expenses & Changes in Net Position (Income Statement) on...

On May 1, 2013, Homer acquired the assets and agreed to take on and pay off the liabilities of Tonga in exchange for 10,000 of Homers common shares. Homer accounted for the acquisition of the net...

2. Estimate (draw) the lines of cost behavior and sales revenue by visual inspection (the lines of best fit). Label each axis and label each line (revenue or cost) and the following points or areas:...

ans Question 133 Arrange the sequencing required to stimulate antibody-mediated immunity. 1. Antigen elimination 2. Sensitization 3. Antibody production 4. Exposure of antigen 5. Antigen recognition...

3. Let (V, ) be an F inner product space. Let u, v E V such that = for all x E V. Show that u = v. 4. Let V be a n-dimensional vector space whose basis is {e1,..., en}. Let n x, y E V...

On 1 February 2022, the exchange rate of Australian dollars for the Indian rupee was 0.0185 AUD/INR. On 10 May 2022, the exchange rate was 0.01897 AUD/INR. If a textile company had a net exposure to...

Assuming distributions to beneficiaries in Year 3 are $42,000, what is the income distribution deduction? Part 1 of the problem is attached below for purposes of relevance and has been answered...

You would like to construct a 95% confidence interval to estimate the population mean score on a nationwide examination in finance, and for this purpose we choose a random sample of exam scores. The...

This problem makes use of Zadeh's extension principle. You are given the fuzzy sets A and B on the real line as follows: u(xi) 1 2 3 4 7 0.3 0.6 0.8 1.0 A B 0.0 0.7 0.2 0.0 0.0 1.0 0.9 0.5 0.2 0.1...

_______ is the reckless disregard for the safety of another. Group of answer choices Nonfeasance Malpractice Misfeasance Criminal negligence

Figure shows an inductor wound on a laminated iron core of rectangular cross section. Assume that the permeability of the iron is infinite. Neglect magnetic leakage and fringing in the two air gaps...

Critical Current Density in Superconductors One problem with some of the newer high-temperature super conductors is getting a large enough current density for practical use without causing the...

A capacitor has two parallel plates with area A separated by a distance d. The space between plates is filled with a material having dielectric constant K. The material is not a perfect insulator but...

The influence of increasing solution velocity on the over voltage-versus-log current density behavior for a solution that experiences combined activation???concentration polarization is indicated in...

In the rest frame of a conducting medium the current density satisfies Ohm's law J' = E', where is the conductivity and primes denote quantities in the rest frame. (a) Taking into account the...

An electromagnetic wave propagating in seawater has an electric field with a time variation given by E = zE0 cost. If the permittivity of water is 810 and its conductivity is 4 (S/m),...