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I need reflective grating for ECDL. If you'd somehow managed to make a grating that reflects 20-60% of the beam in Littrow configuration, I'd be very interested to test them. Otherwise there's Edmund Optics ruled grating for €80 that seems to fit the bill.

There're so such thing as cheap pulsed driver for fast laser diodes. I'm willing to guide you through and share my article on the topic, but you need to know it'll be a project requiring custom-built RF circuit board (100ns pulse has to have edges at single ns range and that has harmonics into...

In this multi post series, I'll describe step by step series how I built by ECDL setup. Let's start with physical construction. Design In this build, I'll use diffraction grating to reduce the bandwidth. The grating will be operating in Littrov configuration. In this case, it's beneficial to...

There exist ~960nm 10W fiber coupled pump diodes for Yb:fiber laser. You can get broken laser with a few pump modules for <$500. Then you need some nice driver, big heatisnk and collimator

well for that you don't need high power nor too short wavelenths

This question instantly shows you're from the US :) M9 is standard 9mm thread. You could try some tiny collimator like 355390-A from thorlabs. It's small enough to be able to manufacture threaded holder and fit in your 7mm limit.

5.6mm laser diodes will be problematic to fit, maybe it's worth switching to 3.8mm. Also most colimating lenses are mounted in M9 mount, so I guess the only option here is to switch to some custom mount, probably some flexure

Nah, PET transmissive gratings I also have. For ECDL I need grating specifically in littrov configuration and somehow Chinese $25 models disappeared. The best I found is $80 at EO, I'm hoping someone here has leftover grating or small cutout from some project.

Well not really too early as much as it's niche field. We had many UV lasers for decades. There's simply no financial incentive to get LDs there too.

You can do one better and buy "cyan" mercury lights from china that are almost pure UV lamps with high power <100$

Hi, I'm looking for 1200 lines/mm reflective diffraction grating. Can be really small (6x6 mm minimum). Anyone has something reasonable for sale?

I mean for photography why do you need laser? noncoherent sources of much hier powers are avaiable easily

I'm curious if you can put 3 gain chips in series and just pass-through the previous beam. If there are any absorption losses for different wavelengths in semiconductors. I guess only R->G->B would work

Aaaa, makes sense

https://www.ebay.com/itm/195947379377 Seems like nice, too good to be true, deal on pulsed YAG. Any opinion?

I'm not saying it's not possible. I'm saying it's not possible with your budget. BER grows with speed unless you compensate with power or better alignment. Yes, HeNe is helium neon laser. I already linked you another laser. The one you select is simply underpowered. With 5mW and 1Gbps you have...

Full duplex, FSO system, with datarates of 1Gbps? Let's just call it a good joke Let's start with obvious expenses (pries excl. tax): 2x photodiode - DET025AFC/M - 610e 2x beam expander - GBE20-C - 1400e 1x HeNe for alignment - 1000e 1x expander for HeNe - 600e laser diode you selected is much...

Quality beam expander and collimators are your biggest problem. Next is precise aiming and automatic tracking system. Further some set of high speed detectors are needed. We could help you with many things but we need to know more details. And to be sure that the quesiton is serious please state...

Do you still happen to have few high binned red diodes?

Depending on required efficiency and acceptable manual labour a lot of multimode fibers that do direct beam shaping might be an option