Re: [8023-10GEPON] [POWER-BUDGET] 10G PIN sensitivity at ONU
Dear Dr. Lingle;
In the vender discussion last week here, it was revealed that PX10 1G/10G
co-existence cannot be achieved with a PIN dual-mode receiver.
I suggest now the other option to use 10G APD dual-mode receiver with
optical attenuator in front, which may be possible to achieve co-existence.
I will show the picture to vendors and ask for their opinion.
I apologize to you for giving confusion.
Best regards
Hiroshi Hamano
Fujitsu Labs. Ltd.
%% "Lingle, Jr, Robert (Robert)" <rlingle@OFSOPTICS.COM>
%% [8023-10GEPON] [POWER-BUDGET] 10G PIN sensitivity at ONU
%% Fri, 11 May 2007 10:45:27 -0400
> All,
>
> The two draft budgets presented on the Reflector (Effenberger 4/18 and
> Takizawa 4/30) differ
> in their assumption of whether a PIN or APD is most suitable for use in the
> OLT in the Upstream case for PX10.
>
> In one case, the use of an APD allows for low Tx average Tx power for PX10
> (Effenberger).
>
> In the other case, the use of a PIN requires a very high (+4 dBm) average Tx
> power, requiring an expensive laser (Takizawa). The reason given for
> requiring the PIN is a concern about the dynamic range required to for a
> 1G/10G dual-rate Rx. It is believed that overload of the APD by the 1G
> signal may be a serious problem.
>
> This seems to be an important point. I would like to ask Hamano-san (or some
> other knowledgeable person) to explain these issues to the group, so they
> can be discussed on the Reflector.
>
> Since it is already Friday night in Japan, I welcome others to jump in with
> relevant comments prior to Monday.
>
> Robert
>
> Robert Lingle, Jr.
> Fiber Design and Transmission Simulation
> OFS Corporate R&D, Atlanta
> 404-886-3581 (cell)
> 770-798-5015 (office)
>
>