Broadband PBS's are go

[LaNeK779]

anything left?

i will be needing 1 or 2 based on availability

[p1t8ull]

Yes LaNek, 7 available in this run.

All the info is in post #1 of this thread which is kept up to date.

Thanks to all those that have paid or at least let me know what's happening

[flecom]

Nasty one that.. they did that to me in August and forced me to give them access to my bank account.
Once they get that information they send you a few shekels which gives them the right to RETAIN that info and then all of a sudden there are no more problems with your credit card.... Nasty program called "internal security" which notices that they haven't had any commission from you for ages.

Best of luck with them

Cheers

ya no I had a bank account with them, but they need to "confirm" a bunch of @%%^...

so I guess the other tens of thousands of dollars I moved through my paypal account were not an issue, but my last transaction for like $65 was

[Xytrell]

I would like one, please.

[andythemechanic]

Hi,

I would take two, please!

[olive13]

hi

I'm in for 2 please.

Thanks

[flecom]

ok payment sent, finally got paypal to fix my account

[krazer]

Hi guys- sorry for the much longer than expected delay on getting back with the results.

These cubes do work from 400-700nm (and by the looks of it beyond that if you have a use), and the extinction ratio is quite good (>99% for 600-400nm, >95% for 600-700nm).

The 'insertion loss' (for lack of a better word) leaves something to be desired, and is as much as 10% in some of the shorter wavelengths, which I believe is due to absorption in the glass. Do we know what these are made out of?

The results are summarized below, divided into 2 groups of testing.
Group 1 - High Power Tests

wavelength	polarization	deflected	passed		input power	%pass		%deflect
405nm		v		0.2		28.3		30.8		91.88		0.65
605nm		h		28		0.6		30.9		1.94		90.61
445nm		v		0.05		47.6		50.7		93.89		0.09
445nm		h		48.2		0.01		50.9		0.01		94.7
660nm		v		0.15		9.25		9.53		97.06		1.57
660nm		h		0.2		9.1		9.45		96.3		2.12

This test was performed by shining a diode laser into the PBS, with both vertical and horizontal polarizations. The output powers (in mw) were measured using a photodiode based power meter (coherent fieldmaster w/ lm2 head), and the calculated transmission/reflection are plotted.

Group 2 - Low Power Tests

wavelength	polarization	deflect		pass		original	%pass		%defect
676nm		v		4		1800		1800		100		0.22
676nm		h		1800		91		1850		4.92		97.3
647nm		v		71		7300		7300		100		0.97
647nm		h		7600		67		7600		0.88		100
520nm		v		16		1400		1500		93.33		1.07
520nm		h		1300		0.2		1350		0.01		96.3
524mn		v		5		390		400		97.5		1.25
524nm		h		340		0.1		340		0.03		100
488nm		v		50		2900		3000		96.67		1.67
488nm		h		3200		3		3300		0.09		96.97
476nm		v		2		310		320		96.88		0.63
476nm		h		310		0.4		320		0.13		96.88

This test was performed using a whitelight argon + pcoam, with physically rotating the PBS to compare V/H polarization. The powers are in arbitrary units (I did not bother dialing the wavelength in for each one, but its roughly 1uw per count). Also note- due to the low power available, I could not take accurate readings on the transmitted direction, so most of the readings are 100% or close to it. Refer to the high power test section for accurate readings regarding the losses in he transmitted direction.

[catalanjo]

Hi guys- sorry for the much longer than expected delay on getting back with the results.

wavelength    polarization    deflected    passed        input power    %pass        %deflect
405nm        v        0.2        28.3        30.8        91.88        0.65
605nm        h        28        0.6        30.9        1.94        90.61
:confused:44nm :confused:  v        0.05        47.6        50.7        93.89        0.09
445nm        h        48.2        0.01        50.9        0.01        94.7
660nm        v        0.15        9.25        9.53        97.06        1.57
660nm        h        0.2        9.1        9.45        96.3        2.12

This test was performed by shining a diode laser into the PBS, with both vertical and horizontal polarizations. The output powers (in mw) were measured using a photodiode based power meter (coherent fieldmaster w/ lm2 head), and the calculated transmission/reflection are plotted.

Thanks for the info Krazer !

I "assume" that the third figure down should be 445nm (not 44nm) since that would be VERY VERY ULTRA ULTRA VIOLET ....LOL

Please feel free to correct me if, in fact, you have been mucking about with X rays again.

Cheers

[krazer]

Indeed, these cubes work all of the way into hard UV

The original post should be fixed