# Looking for high power 1550nm Laser

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#### goxy

##### Full Member level 4
1550nm Laser

I need high power(above 100mW) 1550nm low cost Laser.
Can someone help me?

#### pool_77

##### Full Member level 3
Seach:
SONY SLDxxx, ROHM...
In EU is supplier e.g.: wxw.lasercomponents.de
Maybe try to search VCSEL diodes.

For this power will be problem with speed of laser

pool_77

#### jourval

##### Member level 4
I work with all kind of telecommunication lasers many years
@1550 no any diode laser with power more than 30-40 mW
it is technically impossible to get more with reasonable life time
You need laser based on erbium doped fiber.
Number of firms produce such kind of lasers, but take in account

Nick C.

#### goxy

##### Full Member level 4
I'm find that SONABEAM's free space communicator use 4x160mW 1550nm VCSEL diodes and cost about 10k$. That's mean one diode with 160mW power can't cost more than 1500$.
It's too much for me, I need some diode about 500$. #### goxy ##### Full Member level 4 Hey guys where are you? Number of firms produce such kind of lasers, but take in account cost will be 20k$ or more
You're looking
at easily $40,000-50,000 or more About what you are mean, on Laser Cannon? Let's post here yours lasers, I'm interesting what I'll get for 20-50k$.
Are you mean that I need 100kW Laser?

#### jourval

##### Member level 4
as far as I know most of InGaAs diode lasers
intended for fiber telecommunication use.
1550nm is transparency window for fiber, but not for air
so it seems very strange to use it.
In all case, try to describe your project,
I work some years for JDSU laser division, one of
biggest diode laser vendors in the word, so I familiar with
diode lasers more or less.

#### goxy

##### Full Member level 4
I build low budget project with full price about 1000$per one device like this : hxxp://www.fsona.com/product.php?sec=155m And 500$ for laser diode is too much for me, I'm very very bad with money.
I'm find some laser diodes on 780, 875 and 1020nm for about 50-150$with power about 50-150mW. This is so much money too, but I except that one day will be back. I try to find some laser diodes on 1550nm for small difference in prices (about 200$ for one 100mW diode will be excellent price on this wavelength for me).

#### jourval

##### Member level 4
Why espesially 1550 ?
Laser 1550 can't be cheaper than laser in 0.8 range by definition
Most powerfull is VCSEL's, but historically, first was done 850 nm VCSEL
after that 1300 and only few years ago 1550.
Technology and materials for GaAs much cheaper than for InGaAs.
BTW what is the bitrate needed ?
Somethink like https://www.scd.co.il/laser_qcw.html cann't have high speed !
In all case, look in JDSU direction, them not best one ,as a rule,
but relatively cheap thanks to high volumes
https://www.jdsu.com/index2.cfm?NAVCID=5&CID=5&PageName=Laser Diodes&ACT=Default&G_ID=12&C_ID=353

#### goxy

##### Full Member level 4
Laser Diode 808-812 nm, 0.5-4.0 W from JDS and QCWLD-480 is good wavelenght, but very dangers lasers for eye, do you know prices?
I try to find on 1550nm because eye safety.

I'm not sure that I can order small quantity (1-5) lasers from this manufactures.

#### jourval

##### Member level 4
Any laser more than 20-30 mW dangerous for eye !
And more than 60-70 mW even for skin .
So in all case you must work very carefully, no any reflective objects on working table etc. It is serious ! I know number of peoples that lost their eye thanks to accidental reflection.
As far as I know - to buy 2-3 lasers will not a problem,
nobody not buy at once 1000 witout sample testing !
If you need not more than 150-200 mW of power @0.8 range
real price will be 30-150 $mostly depend of packaging. Unpackaged sandwich (only laser between 2 copper heatsinks) = 30-50$
but you'll need active cooling, I meen termoelectrical cooling with appropriate thermal capacity ( Melcor for example, approx. 20-30 buks) and some electronics for driving of course. As a rule uncollimated laser
light is unusable, beam profile for diode laser is cone with 3-5 degree
@ top, and try to calculate what your reciever will get after 200-300m !
A few nanowatts (if not pico-!). So for real working open space communication line you'll need 2 telescopes (collimators) for laser and for reciever with max. achievable aperture... and lenses with 15-20 sm
diameter will be, I think, most expensive part of project.
Also you will need narrowband optical filter for your reciever

#### jourval

##### Member level 4
The best way (and simplest) for laser safety is to fix laser on the
table and build "trap" for laser beam from bricks, ceramic plates
or tube (best !)
or something like, that cann't fire and have diffusive reflection.
By the way I think that reflection from walls is not actually dangerous
thanks to high beam expansion and diffusive reflection
of standart wall coating, but let's not check this clame :roll:
For the first experiments you can use optical filter from any
old VCR with IR remote control it is not best solution, but better
than nothing. Collimator could be build with plastic lenses
that much cheaper, but for 0.8mkm will be well enough.
For example relatively big plastic magnifier glass for reading