Hi,
We're using some 1.3-1.7um telco laser diodes for measurements and 5.6mm to-can
versions are becoming obsolete.
There are still suitable diodes with integrated fiber coupling lens,
which have focus at 7.5mm from the base. The coupled power may be
specified, but that's about it.
I'm a bit worried about stray light in the measurement and the focus
seems to have plenty of stray light when viewed with IR card.
I could put a pinhole at the focus, but that's again additional
mechanics and manufacturing steps.
Does anybody have experience in this kind of diodes and their focus
quality ?
--
mikko
On Thursday, June 20, 2019 at 9:03:51 AM UTC-4, Mikko OH2HVJ wrote:
Hi Mikko, You mean a laser diode pigtailed into a fiber. https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1489
Do you need a lot of them, or just a few for testing? Maybe
just buy a bunch before they go eol?
ggherold@gmail.com writes:
On Thursday, June 20, 2019 at 9:03:51 AM UTC-4, Mikko OH2HVJ wrote:
Hi Mikko, You mean a laser diode pigtailed into a fiber. https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1489
Something like this, I guess these are used in the pigtailed versions: http://www.lasermate.com/CWDM5AC2G.html
OK that's harder. We have a lifetime supply of Sanyo 785 nm LD's.. butDo you need a lot of them, or just a few for testing? Maybe
just buy a bunch before they go eol?
Depends on what is a lot :-) Hundred pieces for starters and thousands
of pieces during the next few years. I'm afraid the current ones are
EOL, which is one of the reasons for updating design. We're buying all
we can get to buy some time.
--
mikko
On Thursday, June 20, 2019 at 10:12:19 AM UTC-4, Mikko OH2HVJ wrote:
ggherold@gmail.com writes:OK. I've never used something like that.
On Thursday, June 20, 2019 at 9:03:51 AM UTC-4, Mikko OH2HVJ wrote:
Hi Mikko, You mean a laser diode pigtailed into a fiber.
https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1489
Something like this, I guess these are used in the pigtailed versions:
http://www.lasermate.com/CWDM5AC2G.html
(Hopefully Phil H. will have some ideas.)
OK that's harder. We have a lifetime supply of Sanyo 785 nm LD's.. butDo you need a lot of them, or just a few for testing? Maybe
just buy a bunch before they go eol?
Depends on what is a lot :-) Hundred pieces for starters and thousands
of pieces during the next few years. I'm afraid the current ones are
EOL, which is one of the reasons for updating design. We're buying all
we can get to buy some time.
for us that's about 500 pieces.
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