Hi,
I wish aware you of fraudulent activity of the following seller :
hesc_photonics http://myworld.ebay.fr/hesc_photonics
I have already done it on the French side of Laserfreak where I am an active member.
It is not by evil intent or by revenge, it is only to inform all passionate as us who want to buy a replacement diode for DPSS .
I am taking on my time to write you et hope that this information will be widely forward to English, French, German section.
For the story I outbid as lot of people on the following product :
http://cgi.ebay.fr/ws/eBayISAPI.dll?ViewItem&item=290359056497&ssPageNam e=STRK:MEWNX:IT
Offer seams interesting but surprise on the reception.
Seller speaks of a power of 2 to 3 w and write "up to 3w".
When I receive the diode I see quickly the cheat : emitting size 100µmx1 (easly recognising with eyes, no need to open the bag).
And the manual instruction is homemade with operational current of 1.2A and 2W max.
Everyone knowing minimum of diode characteristics will see quickly than 1.2A of current is egal to 1W of power, not 2-3W and not at all up to 3W.
So emitting size for a 2-3W is normally 150µm or 200µm as generally finds. You can check it by tiping on google website : " 808nm c-mount pdf " for example.
I required explaination from seller :
(Names are hidden for confidentiality reasons)
Hi XXXX
I've received your laser diode today.
You have sent one c-mount laser diode 1w but not one 2-3w.
this diode has an emitter size of 100µmx1 .
it isn't one 2-3w like to your advertisement.
in general, a 2-3w laser diode has not a current of 1.2A but rather 2.5-3A with a emitting size of 150@200µmx1.
I am desapointed and ask you to send me back the right product please.
I wait your answer....
With my best...
Olivier XXXXX
Marseille
France.
And below his reply :
If unhappy please return the laser diode. I set the drive requirement conservatively so people won't blow them up.
All is say in the reply, he is just trying to justify himself but from the wrong way.
I push his reasoning until the end, by make him believe that I understand his theory :
I want to believe in you ,but when you say that: "I set the drive requirement conservatively so people won't blow them up."
how many, you estimate the operating current of this diode with good heat sink and long life?
because 1.2A is far away to 2-3w power !!!! corresponding to 1w of power, not more....
when you have testing this lot of same diode, which was damage threshold current value you have found please?....
Question stayed without any reply today
Pls forgive my English which is far to be perfect!!
To finish, without any real try as it was taking risk to have more bad surprise (and I want to send back this order), there is a real fraud on the goods.
I am speaking only of the products, and not of his impolite reply
And it seems that I am not the only one who has been fooled: diode with wrong specification or in end of life
We are already several members from LF in the same case.
If you are interested you can reply to this "post" and give your version.
Greetings.
Olivier