Fiber Communication

Forum Post: RE: ONET8501 application question

Alex Davidson — Wed, 15 May 2013 13:31:00 GMT

Hello Bogey.

The temperature sensor in the ONET8501V is not trimmed internally to reduce part-to-part variation. This is why we only state a typical accuracy of +/-4degC. It should be noted that this will not meet the SFF=8472 digital diagnostic requirement of +/-3degC if you are following this standard.

To try and reduce the prt-to-part variation of the temperature sensor output voltage register 10 can be used to adjust the offset (intercept) of the line and register 11 can be used to adjust the slope of the line to try and keep the voltage vs temperature curves the same. Each part would have to be adjusted during setup and there is not a definitive method to make the adjustments becasue each curve can be differnet to start with. It has been my general recommendaton not to use these registers.

I'm not sure why you have some noise on the TS output. What type of load do you have connected to the pin? Is the pin connected to the input of an ADC on an MCU? Some more information would be helpful.

Regards,

Alex.

Forum Post: RE: Difference between ONET4291T and ONET4291TA

Ivan Ng — Thu, 09 May 2013 01:21:00 GMT

Hi Alex

Thanks very much for your prompt response

Ivan

Forum Post: RE: ONE8521T

Alex Davidson — Fri, 26 Apr 2013 16:31:00 GMT

Hello.

1. Please refer to Figures 3 and 7 in the datasheet. For input currents below about 50uApp, the operation is linear and the gain is maximum. The AGC is not on in this range of operation.

2. There is an AGC circuit that will engage as the input current to the device is increased. Please note that the device was designed for DC balanced, NRZ signals used in typical communication links and defined by SONET, Ethernet and Fibre Channel. If you are using a different type of input signal, the operation of the AGC circuit may not be as shown in Figures 3 and 7.

Regards,

Alex.

Forum Post: RE: CW laser current driver, modulable in the MHz range.

Alex Davidson — Mon, 22 Apr 2013 14:55:00 GMT

Hello Saber,

I'm sorry but the laser drivers we develop are for communications systems such as Ethernet, SONET and Fibre Channel. We do not offer high current CW laser drivers in our portfolio.

Regards,

Alex.

Forum Post: RE: Unusual application for ONET4251PA

Alex Davidson — Tue, 05 Feb 2013 17:23:00 GMT

Andy,

I will call you.

Alex.

Forum Post: RE: 3D image acquisition

Philip Ashmore — Mon, 10 Dec 2012 23:33:00 GMT

Thanks for your help!

That link is certainly food for thought.

Regards,

Philip

Forum Post: RE: ONET8501PB and ONET8501V

Alex Davidson — Fri, 09 Nov 2012 18:52:00 GMT

Hello Ted.

The Optowell 10G VCSEL and ROSA are fine to use with the ONET8501V and ONET8501PB.

Regards,

Alex.

Forum Post: RE: Onet4201PA LOS pin drive

Alex Davidson — Mon, 15 Oct 2012 20:14:00 GMT

The LOS pin was not designed to drive a large current in the high state. If this is required then it would be best to use a buffer or external transistor.

Regards,

Alex.

Forum Post: RE: Laser driver ONET1101L

Alex Davidson — Mon, 10 Sep 2012 16:32:00 GMT

I'm sorry but we do not have any laser drivers for analog signals. We only make laser drivers for digital transmission.

Regards,

Alex.

Forum Post: RE: ONET1191P Vod?

John Lally — Tue, 14 Aug 2012 17:02:00 GMT

Hi Alex,

Thanks for making this clear.

-John

Forum Post: RE: information regarding VLC systems

Alex Davidson — Mon, 13 Aug 2012 17:52:00 GMT

Are you referring to the VLC media player?

More information on what you are trying to do would be helpful.

Regards,

Alex.

Forum Post: RE: EVB for ONET1191P

Alex Davidson — Thu, 02 Aug 2012 15:21:00 GMT

Stephen,

An EVB for the ONET1191P is not avaialble.

Regards,

Alex.

Forum Post: RE: Where can I download AMI model for onet8501pb and onet8501v? TKS

Alex Davidson — Thu, 02 Aug 2012 15:12:00 GMT

IBIS-AMI models are not available for these devices.

Regards,

Alex.

Forum Post: RE: ONET1191P SI model?

Alex Davidson — Thu, 02 Aug 2012 15:11:00 GMT

John,

A model is not available for the ONET1191P.

Regards,

Alex.

Forum Post: RE: Question about ONET8531T

Jason Wu — Sat, 21 Jul 2012 18:58:00 GMT

Dear Alex

Thank you ,I think those information really helps a lot.

Best regards by Jason

Forum Post: RE: Evaluation Board/Kit for ONET8511T

Alex Davidson — Wed, 20 Jun 2012 21:04:00 GMT

Vishal,

Since the ONET8531T and ONET8511T are available in die only and are intended to be used with a photodiode an evaluation board is not available.

Regards,

Alex.

Forum Post: RE: ONET8521T and Visible light communication

Alex Davidson — Mon, 18 Jun 2012 20:36:00 GMT

Michael,

The photdiode converts the light into a current and the TIA converts the current into a voltage. Therefore, the frequency band of the light detection is determined by the photodiode.

The typical application for the device is for fiber optic communications in the 850nm or 1310 to 1550nm windows.

Regards,

Alex.

Forum Post: RE: ONET8521T Footprint

Alex Davidson — Mon, 18 Jun 2012 20:33:00 GMT

Michael,

The ONET8521T is available only in die form and is typically used in a TO can with a photodiode. The typical layouts are shown in Figures 17 and 18 in the data sheet.

Regards,

Alex.

Forum Post: RE: ONET8511T

Alex Davidson — Mon, 18 Jun 2012 20:30:00 GMT

Jon,

The AGC will start to engage at around 20uApp input.

Regards,

Alex.

Forum Post: RE: need information

smitha pappu — Wed, 09 May 2012 07:45:00 GMT

Hi Hooman,

Thank you for the inputs provided.

Regards,
Smitha