Recent content by damien88

1. A Nd:YAG laser operates at a wavelength of 1064 nm and is used for frequency doubling in the non-linear material LiNbO3. The laser outputs 1 W of power in a TEM00 mode with a beam waist ω0 = 1.0 mm on the output mirror. A lens of focal length of 50 mm is placed immediately outside the...

I should add, I am unsure as to what I should use the gaussian waist value for. Is there a way for me to calculate the fundamental power using this? Thanks again

1. LiNbO3 is a negative uniaxial crystal. Consider a LiNbO3 crystal used for frequency doubling a laser operating at 1064 nm. The non-linear coefficient is d=3.4x10-23. For the setup considered it is desirable to have a non-linear conversion efficiency of 0.04 %/W, Assume constant fundamental...

Ok, so it should be R1//R4 and R2//R3. Sorry this is dragging on, struggle with the electronics side of the course.

So R1//R2 and R3//R4.

The diagram is similar to this, http://en.wikipedia.org/wiki/File:Diode_bridge_alt_1.svg Obviously just replacing the diodes with resistors. I know I need to suppress the voltage and current sources but I am unsure as to where to take it from there really. I am short on examples for this...

Ok, R1 top left of bridge, R2 top right, R3 bottom left, R4 bottom right. I've taken R1//R2 and R3//R4 and input the strain states for each resistor and simplified as shown in my original question. edit: I believe I actually should be taking R1 and R2 in series and R3 and R4 in series instead?

Anyone?

A strain-gauge bridge is made up of four resistive elements, each element having an unstrained resistance equal to R, as shown in the diagram below. When a strain is applied to the bridge elements R2 and R4 increase in resistance by an amount ΔR, whereas R1 and R3 decrease by ΔR, where...

Thanks very much!

The question asks to suppress the voltage current sources individually to find the Vout. So after suppressing the voltage source I have both resistors in parallel i.e 15k ohms multiplied by the current so 3v. Made a mistake with direction of current source that's where I got -3v from. I then...

That is what I have done by suppressing the voltage and current sources, replacing them with short and open circuits respectively. I am just not sure if I have re-drawn the circuit correctly to which I used to obtain an output of 3v.

adult image hosting I am trying to calculate the output voltage of the circuit as viewed between the two nodes + - and then the equivalent resistance of the circuit looking into the two nodes. I have suppressed the voltage source to obtain Req=30k//30k=15k ohms. Vout=-3v. Suppressing the...

The question itself has been lifted straight from a text and that's what is causing me some issues as I don't fully undertsand exactly what it is looking for.I believe it is just the general waveform I am looking for in this instance. edit: Ok, so now I have E|ψ(t)=L^2/2I||ψ(t)...

Hi, I have just started looking at angular momentum in quantum mechanics and I am considering the question, ''Write down the Schrödinger-like equations for the orbital angular momentum operators L^2 and Lz. Would I be correct in thinking this would be; L^2|ψ=l(l+1)ħ|ψ Lz|ψ=mlħ|ψ Thanks...