Page 15: of Marine Technology Magazine (January 2016)

Table 1 Fiber Type Wavelength Multimode Multimode Single-mode Core diameter 50µm 62.5µm 8 – 10µm Attenuation 850nm 2.5 3.5 N/A (dB/km) 1300/1310nm 0.8 1.4 0.35 1550nm N/A N/A 0.25 ered even though there is adequate optical signal strength at multiplexing (CWDM).

the receiver (quantity vs. quality). In general, the loss budget or allowable attenuation between

Fiber systems employed in the subsea market typically use the output of the transmitter and the minimum required input single-mode ? ber. While there may be some older, legacy to the receiver is on the order of 15-20dB, depending on the systems for shallow-depth applications that use multimode type of signal, data rate, etc. By referring to the data in the ? ber, the great majority of these systems now incorporate ? ber attenuation table (Table 2, found on the top of page 16), single-mode ? ber. This ? ber type change affords larger sea and assuming that the system loss budge is 20dB, the maxi- depths and more high bandwidth signals using wavelength mum distance (from an attenuation point of view) can be ap-

Klein is now a Mitcham Industries, Inc. Company . CLEARLY ...

THE DIFFERENCE IS IN THE IMAGE THE IMAGE

TheKleinUUV3500asdeeloped The Klein UUV-3500 was developed as a side scan sonar with the un- precedented bene?t of an advanced bathymetry payload for the growing

Autonomous Underwater Vehicle (AUV),

Remotely Operated Underwater Vehicle (ROV) and Unmanned Underwater Vehicle (UUV) markets. The UUV-3500 payload utilizes Klein’s proprietary wideband technology for unmatched range and resolution, while operating at reduced

This sea?oor image of a 150 m swath at power to deliver superior capability at a 900 kHz is unaltered and unretouched.

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Marine Technology Reporter 15

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