B777-200
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Total 18600
Workload; Communication Breakdown; Situational Awareness
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Returned To Clearance
Procedure; Environment - Non Weather Related; Human Factors
Deviation from SID track. I was Pilot Monitoring during climb out on the LGL 3B at CDG. We departed with minimum spacing behind a 777-300ER. With a weak to negligible crosswind component in light winds; we got into strong wake turbulence.  Captain/Pilot Flying altered our flight path in an effort to climb above and upwind of the wake.  We were given a frequency change to Departure Control; at which point we were in and out of the wake turbulence.  We were unable to fly over PG264.  Due to frequency congestion and my concern with monitoring the flight path; airspeed and cleaning up the aircraft; I failed to check in with Departure in a timely manner. Weather was VMC with scattered small TCUs and I observed no apparent traffic conflicts. As we began acceleration to clean up; ATC cleared us direct LESGA. Remainder of flight was uneventful.Task saturation and frequency congestion. We could have been more proactive; i.e. requesting increased spacing above standard before commencing takeoff. I also could have been more assertive with pilot-to-pilot; as well as ATC communication; and asked the Pilot Flying if he would like SID track relief or just requested it from Departure Control.
B777 F/O reported track deviations occurred departing LFPG after encountering wake turbulence from a preceding B777-300.