Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > General



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 09-23-2016, 04:48 PM #33
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,660
Rep Power: 26485
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
RedCowboy RedCowboy is online now
Class 3B Laser
RedCowboy's Avatar
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,660
Rep Power: 26485
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
Default Re: How far can I pop a balloon?

Quote:
Originally Posted by HydroSean View Post
Okay so I noticed with my M462 I can power it up with just one 3.7V cell and it makes it low power mode and then I can power it up with two 3.7V cells and it puts it in high powered mode. Is this because the M462 is a multi-mode and the BDR-209 is single mode? I'm thinking I'm going to put this in a seriously tiny microbuild.
@HydroSean

No it's nothing to do with modes like a flashlight, both diodes are on or off, with 1 cell your 462 is just under driven.

Your 462 is likely using a SXD " Bucking " driver and needs a minimum of 6.8 volts to maintain it's set output, with 1 cell it's not putting out the full current.

The 405's driver is " Boosting " and set up to run on 1 cell, the 462's driver is set up for 2 cells, it has nothing to do with the diodes operational mode.

Multimode has a dominate center wavelength with less energetic side bars of the adjacent wavelengths.

Single modes are primarily one wavelength.



However

There is a technical definition: single-mode and multi-mode laser diodes


__________________
You can not put freedom in a bag.
It is in fact an abstract concept.
Yet it is the single most valuable thing anyone has ever had.

Last edited by RedCowboy; 09-23-2016 at 04:59 PM.
RedCowboy is online now   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 09-23-2016, 09:31 PM #34
HydroSean's Avatar
Class 2M Laser
 
Join Date: Mar 2016
Location: Indiana
Posts: 522
Rep Power: 2235
HydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond repute
HydroSean HydroSean is online now
Class 2M Laser
HydroSean's Avatar
 
Join Date: Mar 2016
Location: Indiana
Posts: 522
Rep Power: 2235
HydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond repute
Default Re: How far can I pop a balloon?

Quote:
Originally Posted by RedCowboy View Post
@HydroSean

No it's nothing to do with modes like a flashlight, both diodes are on or off, with 1 cell your 462 is just under driven.

Your 462 is likely using a SXD " Bucking " driver and needs a minimum of 6.8 volts to maintain it's set output, with 1 cell it's not putting out the full current.

The 405's driver is " Boosting " and set up to run on 1 cell, the 462's driver is set up for 2 cells, it has nothing to do with the diodes operational mode.

Multimode has a dominate center wavelength with less energetic side bars of the adjacent wavelengths.

Single modes are primarily one wavelength.



However

There is a technical definition: single-mode and multi-mode laser diodes
Thanks m8, I wish I could rep you again because you're one of the most helpful ppl on this forum. I am going to get the BDR-209 from DTR and put it in the pocket mini chrome host from jayrob. I'll make a thread of the build too and show you guys
HydroSean is online now   Reply With Quote
Old 09-23-2016, 09:49 PM #35
diachi's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,930
Rep Power: 26452
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
diachi diachi is online now
Class 4 Laser
diachi's Avatar
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,930
Rep Power: 26452
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
Default Re: How far can I pop a balloon?

Quote:
Originally Posted by HydroSean View Post
Okay so I noticed with my M462 I can power it up with just one 3.7V cell and it makes it low power mode and then I can power it up with two 3.7V cells and it puts it in high powered mode. Is this because the M462 is a multi-mode and the BDR-209 is single mode? I'm thinking I'm going to put this in a seriously tiny microbuild.

Multi-mode and single-mode refer to the output beam characteristics, not the electrical characteristics. Single-mode lasers emit a nice round beam with a Gaussian profile. Multi-mode lasers do not. That's drastically simplifying it mind you...


Single-mode on the left, multi-mode on the right.

Edit: RCB bet me to it.
__________________


405nm | Banggood LT-850 | "5mW" | Review Unit | Review WIP
445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit | >>Review<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



Check out my Reddit Subreddit! >>/r/laserpointers<<


Last edited by diachi; 09-23-2016 at 09:51 PM.
diachi is online now   Reply With Quote
Old 09-23-2016, 09:50 PM #36
HydroSean's Avatar
Class 2M Laser
 
Join Date: Mar 2016
Location: Indiana
Posts: 522
Rep Power: 2235
HydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond repute
HydroSean HydroSean is online now
Class 2M Laser
HydroSean's Avatar
 
Join Date: Mar 2016
Location: Indiana
Posts: 522
Rep Power: 2235
HydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond repute
Default Re: How far can I pop a balloon?

Quote:
Originally Posted by diachi View Post
Multi-mode and single-mode refer to the output beam characteristics, not the electrical characteristics. Single-mode lasers emit a nice round beam with a Gaussian profile. Multi-mode lasers do not.



Single-mode on the left, multi-mode on the right.
Hey this reminds me of my quantum mechanics class, great pictorial representation, you and redcowboy are both very helpful cheers
HydroSean is online now   Reply With Quote
Old 09-23-2016, 10:15 PM #37
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,660
Rep Power: 26485
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
RedCowboy RedCowboy is online now
Class 3B Laser
RedCowboy's Avatar
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,660
Rep Power: 26485
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
Default Re: How far can I pop a balloon?

Ahh so a 445 MM diode can never operate in Tem 00 mode, I knew that but did not think about why as far as mode.

I was thinkinking about the observable raw output and the bars next to the dominate center wavelength.





I wonder about using special filtering to get a cleaner beam and dot from our MM diodes, I know that last build that minimoto kobyashi posted had a round spot, it was still a very good looking beam, but some trimming had to be in play.

Cypreus IIIb reactivated with 10x fixed magnification Linos beam expander.
__________________
You can not put freedom in a bag.
It is in fact an abstract concept.
Yet it is the single most valuable thing anyone has ever had.

Last edited by RedCowboy; 09-23-2016 at 10:29 PM.
RedCowboy is online now   Reply With Quote
Old 09-23-2016, 10:26 PM #38
diachi's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,930
Rep Power: 26452
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
diachi diachi is online now
Class 4 Laser
diachi's Avatar
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,930
Rep Power: 26452
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
Default Re: How far can I pop a balloon?

Quote:
Originally Posted by RedCowboy View Post
Ahh so a 445 MM diode can never operate in Tem 00 mode, I knew that but did not think about why as far as mode.

I was thinkinking about the observable raw output and the bars next to the dominate center wavelength.




Yep, the optical properties of the cavity don't allow those diodes to lase single-mode. Even if the beam is round, it doesn't necessarily mean that it's single-mode either - as you can see in the diagram I posted. The multi-mode beam is fairly round, but has lots of hot spots instead of a nice even Gaussian profile.

That post you linked does a good job of explaining why.

This page gives some further details and explains the difference between single-longitudinal-mode and single-transverse-mode operation.

https://www.rp-photonics.com/single_mode_operation.html

Also this goes into details about why you get different modes:

https://www.rp-photonics.com/resonator_modes.html

Love that website ... great source of knowledge.
__________________


405nm | Banggood LT-850 | "5mW" | Review Unit | Review WIP
445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit | >>Review<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



Check out my Reddit Subreddit! >>/r/laserpointers<<


Last edited by diachi; 09-23-2016 at 10:30 PM.
diachi is online now   Reply With Quote
Old 09-23-2016, 10:33 PM #39
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,660
Rep Power: 26485
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
RedCowboy RedCowboy is online now
Class 3B Laser
RedCowboy's Avatar
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,660
Rep Power: 26485
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
Default Re: How far can I pop a balloon?

So this truly beautiful build posted by minimoto kobyashi must be clipping inside the round expander. I know that's how it works, because my most powerful builds at a distance make a tiny bar at distance with some splash, but to keep the bar short cylindrical correction of the aggressive diverging axis has to be used or it's an ever lengthening line, even if tiny it's a long line unless the aggressive axis is corrected.





SEE THREAD HERE >>> Cypreus IIIb reactivated with 10x fixed magnification Linos beam expander.
__________________
You can not put freedom in a bag.
It is in fact an abstract concept.
Yet it is the single most valuable thing anyone has ever had.

Last edited by RedCowboy; 09-23-2016 at 10:55 PM.
RedCowboy is online now   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 06:34 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC