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Old 07-21-2020, 09:31 AM   #1
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New guy observation

I just wanted to say...to the single men...if you want to marry someone more intelli...smarter than you...OLChemist has got to be the one!!!

She knows stuff I never heard of in my 33 years of existence.

I didn't even ask if OLChemist was already married.
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Old 07-21-2020, 10:26 AM   #2
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Originally Posted by Joe's Dad View Post
I just wanted to say...to the single men...if you want to marry someone more intelli...smarter than you...OLChemist has got to be the one!!!

She knows stuff I never heard of in my 33 years of existence.

I didn't even ask if OLChemist was already married.
I think she's been holding out for.....YOU !
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Old 07-21-2020, 12:30 PM   #3
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It was never the brain that was the problem. It was the lab full of high powered lasers that ran them off, LOL.
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Old 07-21-2020, 03:38 PM   #4
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lab full of high powered lasers that ran them off, LOL.

blue inert gas ion laser. Input power 20.000 W output power 1 W. High pressure water cooling?

tunable dye laser input power 1 Watt output power 10 mW? untuned 100 mW?

Yeah, I see OL Chemist aiming with high powered laser
at the entrance for stimulating the dye laser.

LOL, the Rehypsum (trans. gypsum) plates of the physical labor had quite a number of holes by misaiming the blue laser and the fornt steel plate of the dye laser was torched by misaiming severely too. And the Prof burned the detectros most sensitive area by firing the blue laser rigth into that spot.

Oh and the liquid nitrogen for cooling burned the hand of one student when he did not pay attention to drops flying around.
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Last edited by OLChemist; 07-21-2020 at 04:59 PM.. Reason: Added translation of German term.
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Old 07-21-2020, 05:51 PM   #5
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I pride myself on careful alignment and tuning. The burns on the lab wall were not of my doing. I learned my lesson my first year, when I drilled the Brewsters window in the amplifier of my dye laser with a focused back reflection. Having a jet of Coumarin 480 in methanol spray ten feet across the lab will, as my father used to say, learn you something.

I aligned at low power and ramped up slowly, walking the beam in as the thermal effects accompanying the power increase caused beam drift. I walked beams on to diffuse beam blocks in front of apertures. I never trusted the paint jobs on housings to not burn off and give you several seconds of a specular metal surface before it ablated. Except for my pump lasers, most of the beams my labs were IR and UV. I worked very hard to always have a really good idea where the invisible, eye damaging beams were.

I was also known to suffer fools and the careless very badly. I threw a grad student off my equipment because he like to play with the mirrors and set things on fire. He had to go across the hall and work on the weeny diode laser (0.5mW) until he learned to respect high power beams and high voltage power supplies. Even when he got to be less of a loose canon, I would send him home if I had to work on the power supplies. (This was during the early years of lead free solder and the blend the manufacturer used grew zinc whiskers and would short the power supplies to ground. We were replacing the high voltage diodes every few months.)


As for the liquid nitrogen, that was a different story. We all played with it. I did get burned once, but not playing.

In one of the labs I worked in, all the laser spectrometers had LN2 cooled lasers. The dewars on these had to stay filled even when not in use. Over the Christmas holidays someone had to go into the lab every other day and fill the dewars from the 40L bottles. One year I was doing it and we had missed a delivery to replace the big dewar in my lab, so I was having to take LN2 from the bottle across the hall. I was carrying it in a handleless 2 L wide mouth dewar, which was the only transport dewar we had.

The University strictly forbid us to block the lab doors open, even for a few minutes. You had to grapple with these terrible, stiff door handles while hugging the dewar against your chest in the crook of one arm. This is fine if you were flat chested. It wasn't so great if you're a bit curvy. It would sometimes splash.

Now LN2 drops will boil so fast in contact with your skin, that they skitter along on a layer of gaseous N2. Just like drops of water on a hot skillet. They may sting a bit, but won't burn -- unless they get trapped or cool something enough to wet it.

Well, I was opening the door, when a generous splash rolled over the edge and on to my chest. Most of it fell to the ground, leaving my clothes steaming slightly in places. Unfortunately, some got above the v-neck collar of my blouse. It fell down my cleavage into the my bra. I have never stripped topless so fast in my entire life.
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Old 07-21-2020, 08:59 PM   #6
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And here I thought lasers traveled through melted glass
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Old 07-22-2020, 01:23 AM   #7
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Would that it had melted and that the mechanism of laser damage was so straight forward. My excitation sources were pulsed; they can do some interesting things, even in otherwise transparent materials.

Laser Induced Damage


Careful, JD. You're getting dangerously close to asking a scientist about her research. This has been known to cause head injury when you fall asleep and fall from your chair as she goes on and on, LOL.
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Old 07-22-2020, 01:35 AM   #8
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Laser Induced Damage


Careful, JD. You're getting dangerously close to asking a scientist about her research. This has been known to cause head injury when you fall asleep and fall from your chair as she goes on and on, LOL.
Nice reading but you may have caused already heavy headaches to Joes's Dad and WD by referencing that information. It brings back memories from times long past at the univerity.

I forgot, in the physical lab we had two old vacuum pumps driven by mercury. The lab doc ones tried to repair a pump but spilled the whole load of mercury in his lab part and crawled along the floor to collect the mercury drops on the floor. Well, it wasn't surpring. His lab part always looked as if somebody had thrown some handgranades into his lab.
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Involve me, and I will learn.”
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God, grant me the serenity to accept the things I cannot change,
Courage to change the things I can,
And wisdom to know the difference.
Living one day at a time,
Enjoying one moment at a time,
Accepting hardship as a pathway to peace.
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Old 07-22-2020, 03:24 AM   #9
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I just wanted to say...to the single men...if you want to marry someone more intelli...smarter than you...OLChemist has got to be the one!!!

She knows stuff I never heard of in my 33 years of existence.

I didn't even ask if OLChemist was already married.
Welcome to the forum, New Guy.
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Old 07-23-2020, 02:02 PM   #10
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Would that it had melted and that the mechanism of laser damage was so straight forward. My excitation sources were pulsed; they can do some interesting things, even in otherwise transparent materials.

Laser Induced Damage




Careful, JD. You're getting dangerously close to asking a scientist about her research. This has been known to cause head injury when you fall asleep and fall from your chair as she goes on and on, LOL.
I like the part about on and on! &#128514

Tell me the part about refractive index and Rayleigh scattering and chromatic dispersion.

I better stop before I fall out my chair and hurt my head. &#129301
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Old 07-23-2020, 02:04 PM   #11
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Welcome to the forum, New Guy.
I've never been here...again! LOL
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Why must I feel like that..why must I chase the cat?


"When I was young man I did some dumb things and the elders would talk to me. Sometimes I listened. Time went by and as I looked around...I was the elder".

Mr. Rossie Freeman
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Old 07-23-2020, 04:20 PM   #12
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Would that it had melted and that the mechanism of laser damage was so straight forward. My excitation sources were pulsed; they can do some interesting things, even in otherwise transparent materials.

Laser Induced Damage


Careful, JD. You're getting dangerously close to asking a scientist about her research. This has been known to cause head injury when you fall asleep and fall from your chair as she goes on and on, LOL.
And attenuation and cutoff and core/clad concentricity and...

Careful OLChemist, that chair is dangerous!
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Why must I feel like that..why must I chase the cat?


"When I was young man I did some dumb things and the elders would talk to me. Sometimes I listened. Time went by and as I looked around...I was the elder".

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Old 07-23-2020, 05:06 PM   #13
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Tell me the part about refractive index and Rayleigh scattering and chromatic dispersion.
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And attenuation and cutoff and core/clad concentricity and...
Hark, do I hear the language of waveguides? Do we have a fiber optics guy speaking?


I sense a discussion of evanescent waves and propagation modes in the offing.
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Old 07-23-2020, 07:33 PM   #14
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Dang JD you're gonna get her all worked up using them big scientific words !
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Somebody is out there somewhere, thinking of you and the impact you made in their life.
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Old 07-24-2020, 07:57 AM   #15
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Dang JD you're gonna get her all worked up using them big scientific words !
AND...I wear ruby red chuz!!!
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Old 07-24-2020, 08:03 AM   #16
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Hark, do I hear the language of waveguides? Do we have a fiber optics guy speaking?


I sense a discussion of evanescent waves and propagation modes in the offing.
And then we'll coo over whether its silicone doped or germanium doped.

Might even throw a step-index or graded index word in there a time or three!
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Why must I feel like that..why must I chase the cat?


"When I was young man I did some dumb things and the elders would talk to me. Sometimes I listened. Time went by and as I looked around...I was the elder".

Mr. Rossie Freeman

Last edited by Joe's Dad; 07-24-2020 at 08:05 AM..
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Old 07-24-2020, 11:41 AM   #17
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Ruby Red, Ruby red;


there was something elsewhere about Ruby Red wearable art and fashion.

May be the Silicon, Germanium or Gallium is doped. Hopefully not GalliumArsenid.
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Old 07-25-2020, 09:10 PM   #18
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And then you got the gob.
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Why must I feel like that..why must I chase the cat?


"When I was young man I did some dumb things and the elders would talk to me. Sometimes I listened. Time went by and as I looked around...I was the elder".

Mr. Rossie Freeman
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Old 07-26-2020, 01:24 AM   #19
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Wasn't that your intention, getting true?
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Old 07-26-2020, 05:32 AM   #20
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Quote:
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Wasn't that your intention, getting true?
Only intention I have when I come on powwow.com is to be with my NDN friends is to laugh and connect with Cherokee native side. Oh, snap. I'm not Cherokee!

A gob is a by-product in the Draw area in the fiber optic manufacturing process.

OLChemist, wanna hear about fiber breaks seen under a 600 power electron microscope? Coo.
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Why must I feel like that..why must I chase the cat?


"When I was young man I did some dumb things and the elders would talk to me. Sometimes I listened. Time went by and as I looked around...I was the elder".

Mr. Rossie Freeman
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