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ONET8551T: TI solutions for Free space Optical Communication

Shyam Daram
Expert 1305 points

Part Number: ONET8551T
Other Parts Discussed in Thread: ONET1101L, ONET8531T, ONET8501PB, , LMH13000, DLP9500UV, ONET1131EC, ONET8501V

Tool/software:

Hi

Does TI offer any Free space optical communication solution for Speeds up to 10G ?

i came across ONET series, but are they only limited to typical SFP module solutions only ?

Kindly suggest any application note to study.

  • 0
    TI__Mastermind 32615 points

    Hello Shyam, 

      We do not offer a full FSO solution. Some of our ONET devices can be used in a discrete solution for FSO acting as the receiver (ONET8551T, ONET8501PB, ONET8531T). And the other ONET devices can be used as the FSO transmitter to drive a laser (ONET1151L, ONET1101L). 

      We also have a new laser driver: LMH13000, but this device is more suited for OTDR/LiDAR solutions to drive 5A pulse trains up to 250MHz.

      However, we do not have an integrated solution that contains a photodiode + TIA/limiting amplifier for the receiver side, and for the transmit side laser driver + laser) Photodiode and laser will be separate and the ONET devices can be used for TIA/limiting amplifier and laser driver. 

      I am not too familiar in the details of FSO communication, but they commonly use a VCSEL (Vertical-Cavity Surface-Emitting Laser) and a InGaAs quadrant photodiodes. There are also most likely more details such as using a light modulator: such as DLP9500UV which is a digitally controlled micro-electromechanical system (MEMS) spatial light modulator (SLM). When coupled to an appropriate optical system, the DLP9500UV can be used to modulate the amplitude, direction, and/or phase of incoming light (from this paper).

    Thank you,
    Sima

  • 0 in reply to Sima Jalaleddine
    TI__Expert 5516 points

    Lmh13000 can be used to drive 5mA as well using vset pin.  if low current is needed lmh13000 should work as well for driving laser on and off 

  • 0 in reply to Shreenidhi Patil
    Expert 1305 points

    For long range transimission i am feeling direct current modulation may not be sufficeint, may be i need to try external modulation using MZM, have you got any experience on long range transmissions ?

  • 0 in reply to Shyam Daram
    TI__Mastermind 32615 points
    Shyam Daram said:
    For long range transimission i am feeling direct current modulation may not be sufficeint, may be i need to try external modulation using MZM, have you got any experience on long range transmissions ?

    Hello Shyam,

      You are correct. It will not enough bandwidth for your needs. I would go back to earlier suggestions: ONET1151L, ONET1101L, and ONET1131EC. The team that handles these devices would be more familiar with this type of application. I am rerouting this thread to our optical networking group, and they will be able to help you shortly with a specific recommendation.

    Thank you,
    Sima

  • +1 in reply to Sima Jalaleddine
    TI__Mastermind 43858 points

    Hi Shyam,

    In terms of ONET series parts, we do not have devices specifically designed for free space optical communication.  This parts are targeted at SFP module implementations.

    With that said, Sima mentioned VCSEL laser.  ONET8501V is a VCSEL laser driver.

    Thanks,

    Drew