公开(公告)号：US5969836A

公开(公告)日：1999-10-19

申请号：US991106

申请日：1997-12-12

Applicant: Lawrence Edwin Foltzer

Inventor： Lawrence Edwin Foltzer

IPC: H04B10/00 ,  H04B10/24 ,  H04H20/69 ,  H04H20/80 ,  H04J14/00 ,  H04J14/02 ,  H04L12/28 ,  H04M11/06 ,  H04N7/173 ,  H04N7/22 ,  H04Q11/00

CPC classification number: H04H20/80 ,  H04B10/2503 ,  H04J14/0226 ,  H04J14/0232 ,  H04J14/0234 ,  H04J14/0246 ,  H04J14/025 ,  H04L12/2801 ,  H04M11/062 ,  H04N7/17309 ,  H04N7/22 ,  H04Q11/0062 ,  H04H20/69 ,  H04J14/0282 ,  H04Q2011/0075

Abstract: Downstream digital telephony signals are transmitted over the 1310 nm transmission band of a silica optic fiber. Upstream digital telephony signals are transmitted over a "short wavelength" portion of the 1550 nm transmission band of the optic fiber, i.e. within a portion of the 1550 nm transmission band having wavelengths less than a predetermined threshold wavelength of 1550 nm. Simultaneously, downstream analog video signals are transmitted over a "long wavelength" portion of the 1550 nm transmission band of the optic fiber, i.e. within a portion of the 1550 nm transmission band having wavelengths exceeding the predetermined threshold wavelength of 1550 nm but still within an erbium-doped fiber amplifier gain profile. Thus, the upstream digital telephony signals are always transmitted at wavelengths shorter than the threshold wavelength and the downstream analog video signals are always transmitted at wavelengths longer than the threshold wavelength. Accordingly, no significant signaling conflicts occur between the upstream digital telephony signals and the downstream analog video signals, and both upstream and downstream digital telephony signals and analog video signals are reliably carried over the single optic fiber.

Abstract translation: 下行数字电话信号通过硅光纤的1310nm传输频带传输。 上行数字电话信号通过光纤的1550nm传输频带的“短波长”部分传输，即在具有小于1550nm的预定阈值波长的波长的1550nm传输频带的一部分内传输。 同时，下游模拟视频信号通过光纤的1550nm传输频带的“长波长”部分传输，即在具有超过1550nm的预定阈值波长的波长的1550nm传输频带的一部分内，但是仍然在 掺铒光纤放大器增益曲线。 因此，上游数字电话信号总是以比阈值波长短的波长发送，并且下游模拟视频信号始终以比阈值波长长的波长发送。 因此，在上游数字电话信号与下游模拟视频信号之间不会出现显着的信令冲突，并且上游和下游的数字电话信号和模拟视频信号可靠地在单个光纤上传送。