Appendix C: Acronyms
631
(continued)
OXC
Optical crossconnect
P2P
Point-to-point
PBG
Photonic bandgap fiber
PC
Personal computer
PCE
Power conversion efficiency
PCF
Photonic crystal fiber
PCVD
Plasma-activated chemical vapor deposition
PDF
Probability density function
PDH
Plesiochronous digital hierarchy
PDL
Polarization-dependent loss
PHY
Physical layer
pin
(p-type)-intrinsic-(n-type)
PLL
Phase-locked loop
PM
Phase-modulation
PMD
Polarization mode dispersion
PMMA
Polymethylmethacrylate
POF
Polymer (plastic) optical fiber
POH
Path overhead
PON
Passive optical network
POP
Point of presence
PPP
Point-to-point protocol
PRBS
Pseudorandom binary sequence
PSK
Phase shift keying
PTB
Physikalisch-Technische Bundesanstalt
PVC
Polyvinyl chloride
QCE
Quantum conversion efficiency
QoS
Quality of service
RAPD
Reach-through avalanche photodiode
RC
Resistance-capacitance
RF
Radio-frequency
RFA
Raman fiber amplifier
RIN
Relative intensity noise
RIP
Refractive index profile
rms
Root mean square
ROADM
Reconfigurable OADM
ROF
Radio-over-fiber
RS
Reed-Solomon
(continued)