Re: [8023-10GEPON] [CHANNEL_LINK] RF video issue
Marek,
I want to note that the SRS predictions of the link model (what I have seen so far) are for an RF overlay consisting of AM RF subcarriers (just like what is used in a standard CATV network). The J.185 system, which I believe (someone please correct me) has only been deployed by NTT, transmits a wideband FM'ed (and RF upconverted) version of the standard AM. (See the paper quoted: Kikushima, et al., JLT, vol 8, 839 (1996)) Since virtually all the information has been moved to RF frequencies above 200 MHz, SRS effects are minimized. At the ONU the Wideband FM is converted back into standard AM, and the low frequency channels are unharmed.)
Presently, I don’t believe the J.185 compliant RF overlay has been explicitly considered within 802.3av as either a interferer or a victim.
As far as the "benefit" of the SRS goes, it's reasonable that it would add optical power to the 10G signal, but this should not have a positive effect on the BER - it should slightly reduce the extinction ratio.
David Piehler
Alphion
mobile: +1 732 692 4581
-----Original Message-----
From: Mitsunobu Kimura [mailto:mitsunobu.kimura.be@HITACHI.COM]
Sent: Friday, March 02, 2007 2:35 AM
To: STDS-802-3-10GEPON@listserv.ieee.org
Subject: Re: [8023-10GEPON] [CHANNEL_LINK] RF video issue
Dear Marek,
Thank you for having interests.
The SBS was suppressed in both signals, using the line width.
The main point of the experiment was to see any effect on the RF video signal.
But nothing has happened actually.
Regards,
Mitsunobu Kimura
>Dear Kimura-san,
>It is ineed a pity that You did not collect any more information from such a interesting experiment. It would provide us with solid evidence for the link modelling approach. It also seems to defy the theoretical estimations of the SRS and SBS impairments in the presence of 16dBm video overlay ...
>I am at a loss - I would personally like to see the results and then start discussing about the implications ...
>Best wishes
>
>Marek Hajduczenia (141238)
>SIEMENS Networks S.A. - IC COM D1 R
>Rua Irm?os Siemens, 1
>Ed. 1, Piso 1
>Alfragide
>2720-093 Amadora
>Portugal
>* Marek.Hajduczenia@siemens.com
>http://www.marekhajduczenia.info/index.php
>(+351.21.416.7472 4+351.21.424.2082
>
>
>-----Original Message-----
>From: Mitsunobu Kimura [mailto:mitsunobu.kimura.be@HITACHI.COM]
>Sent: quinta-feira, 1 de Mar?o de 2007 11:22
>To: STDS-802-3-10GEPON@LISTSERV.IEEE.ORG
>Subject: Re: [8023-10GEPON] [CHANNEL_LINK] RF video issue
>
>Dear Marek,
>
>Yes, the range is from +1 to +13 dBm.
>But I didn't collected the 10G optics data.
>Also I used an ordinary SMF.
>
>The BER curves and the optical power meter told the improved gain.
>But it doesn't provide the accuracy.
>
>I just posted the result in this reflecter since I am wondering if
> it is beneficial to the 802.3av meeting to make a presentation.
>But even in the meeting, what I can show is the 2-line results below.
>
>Regards,
>Mitsunobu Kimura
>
>
>>Dear Kimura-san,
>>Thank You for the email and the information.
>>Would You be willing to shed more light on the parameters of te Tx module (dithering, model etc.). I understand that the launched power levels were in the range of 1 and 13 dBm and not 1 and -13 dBm.
>>Did You consider the PSC in the signal path ?
>>When You say "- 10GE improved around 0.2dB gain due to the effect from RF video to 10G" - do You mean that the signal amplitude was actually boosted?
>>Are You going to prepare the presentation for this meeting in Orlando ? I believe the channel link ad hoc should see it before ...
>>Best wishes
>>
>>Marek Hajduczenia (141238)
>>SIEMENS Networks S.A. - IC COM D1 R
>>Rua Irm縊s Siemens, 1
>>Ed. 1, Piso 1
>>Alfragide
>>2720-093 Amadora
>>Portugal
>>* Marek.Hajduczenia@siemens.com
>>http://www.marekhajduczenia.info/index.php
>>(+351.21.416.7472 4+351.21.424.2082
>>
>>
>>-----Original Message-----
>>From: Mitsunobu Kimura [mailto:mitsunobu.kimura.be@HITACHI.COM]
>>Sent: quinta-feira, 1 de Mar輟 de 2007 10:09
>>To: STDS-802-3-10GEPON@listserv.ieee.org
>>Subject: [8023-10GEPON] [CHANNEL_LINK] RF video issue
>>Importance: High
>>
>>Dear all,
>>
>>I am Mitsunobu KIMURA of Hitachi.
>>I've conducted an experiment to see the raman effect between 10GE LAN PHY
>>and RF video last month.
>>But the RF video I tested is a particular system currently working in Japan,
>> which follows ITU-T Recommendation J.185.
>>
>>The results are just simple:
>> - No effects were found from 10G to RF video
>> - 10GE improved around 0.2dB gain due to the effect from RF video to 10G
>>
>>Conditions:
>> - 10GE LAN PHY: 1571, 1591, or 1611nm; TX power 1-13dBm
>> - RF video: 1558nm; Tx power 16dBm; follows ITU-T Recommendation J.185
>> - Transmitted via 20km SSMF
>> - The optical filters completely separated the two optics
>>
>>So far, I may say that we have a nice RF video system to survive on the 10GEPON.
>>
>>For your reference, the J.185 is "Transmission equipment for transferring
>> multi-channel television signals over optical access networks by FM conversion" .
>>It has more robustness than AM transmission system does as shown in a letter:
>> IEEE Photonics Technology Letters. Vol.8 No.6, June 1996 .
>>
>>
>>Regards,
>>Mitsunobu Kimura
>>Hitachi Communication Technologies, Ltd.
>>
>