1. A setting method for installing plug and play device, said method including the following steps enabling a computer system to be installed with a new device:
(1) Opening the set-up file (INF) of the hardware driver of said new device;
(2) Reading the new device ID from said set-up file (INF);
(3) Reading the new device class from said set-up file (INF);
(4) Calling for device driver function (DDK) of installation to copy new driver file of said new device and said set-up file respectively to the corresponding directories;
(5) Searching for the device ID of said new device from the data registry of the Windows system and deleting the original device ID;
(6) Retrieving a device class from the device classes in the data registry of the Windows system corresponding to the original device ID;
(7) Determining whether said device class has been retrieved, if there is no other device class to be retrieved, then going to restart the computer and end up the installation of said new device, and then automatically establishing the accurate connection relationship between said new device and the previously installed driver through the ID and class of said new device in order to let said new device be operated normally; if there is a device class being retrieved, then continuing the next step;
(8) Determining whether the original device ID is same as said new device ID intended to be installed, if not, then returning to step (6) to continue the steps until all device classes have been retrieved;
(9) If the original device ID is same as said new device ID, then deleting the original device ID and returning to step (6) to continue the steps until all device classes have been retrieved.
2. A method according to claim 1, wherein said new device is a plug and play device.
3. A method according to claim 1, wherein said new device is a Sound Blaster Card.
4. A method according to claim 1, wherein said new driver file may be copied to the system directory in the Windows system.
5. A method according to claim 1, wherein said set-up file (INF) may be copied to the INF directory in the Windows system.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. In an optical communication system, apparatus for amplifying an optical signal, said apparatus comprising:
a fiber; and
an optical pump energy source disposed to inject optical pump energy into said fiber in a co-propagating direction relative to a transmission direction of an optical signal in said fiber to cause Raman amplification of said signal in accordance with a gain level greater than 4 dB;
wherein either 1) for a selected signal to noise ratio, there is a greater four-wave mixing product suppression level than would be achieved using only a counter-propagating optical pump energy source to obtain said gain level or 2) for a selected four-wave mixing product suppression level, there is a higher signal to noise ratio than would be achieved using only said counter-propagating energy source to obtain said gain level.
2. In an optical communication system, apparatus for amplifying an optical signal, said apparatus comprising:
a first optical pump energy source disposed to inject optical pump energy into a fiber in a co-propagating direction relative to a transmission direction of said optical signal to cause Raman amplification of said signal in accordance with a first gain level;
a second optical pump energy source disposed to inject optical pump energy into said fiber in a counter-propagating direction relative to said transmission direction of said optical signal to cause Raman amplification of said signal in accordance with a second gain level, said optical signal experiencing a total gain level including said first gain level greater than 4 dB and said second gain level; and
wherein either 1) for a selected signal to noise ratio, there is a greater four-wave mixing product suppression level than would be achieved using only said second optical pump energy source to obtain said total gain level or 2) for a selected four-wave mixing product suppression level, there is a higher signal to noise ratio than would be achieved using only said second optical pump energy source to obtain said total gain level.
3. The apparatus of claim 2 wherein said second gain level is set responsive to said first gain level and said total gain level.
4. The apparatus of claim 2 wherein said first gain level and said second gain level are set responsive to a desired maximum double Rayleigh scattering level.
5. The apparatus of claim 2 wherein a power level of said first optical pump energy source is set responsive to said first gain level.
6. The apparatus of claim 2 wherein a power level of said second optical pump energy source is set responsive to said second gain level.
7. The apparatus of claim 2 further comprising said fiber.
8. The apparatus of claim 2 further comprising:
an Erbium-doped fiber amplifier in cascade with said fiber.
9. In an optical communication system, apparatus for amplifying an optical signal, said apparatus comprising:
a first optical pump energy source disposed to inject optical pump energy into a fiber in a co-propagating direction relative to a transmission direction of said optical signal to cause Raman amplification of said signal in accordance with a first gain level greater than 4 dB; and
a second optical pump energy source disposed to inject optical pump energy into said fiber in a counter-propagating direction relative to said transmission direction of said optical signal to cause Raman amplification of said signal in accordance with a second gain level;
wherein either for a selected gain saturation level, said first optical pump energy source has a power level set to achieve one of a desired gain saturation level or a desired Rayleigh backscattering level, and said second optical pump energy source has a power level set to obtain a desired gain level given said power level set for said first optical pump energy source; and
wherein either 1) for a selected signal to noise ratio, there is a greater four-wave mixing product suppression level than would be achieved using only said second optical pump energy source to obtain said total gain level or 2) for a selected four-wave mixing product suppression level, there is a higher signal to noise ratio than would be achieved using only said second optical pump energy source to obtain said total gain level.
10. The apparatus of claim 9 further comprising said fiber.
11. The apparatus of claim 10 further comprising an Erbium-doped fiber amplifier in cascade with said fiber.
12. In an optical communication system, a method for amplifying an optical signal within a fiber by exploiting Raman effects to achieve a desired gain level, said method comprising:
injecting co-propagating optical pump energy into said fiber to cause Raman amplification according to a first gain level greater than 4 dB;
injecting counter-propagating optical pump energy into said fiber to cause Raman amplification according to a second gain level; and
wherein either 1) for a selected signal to noise ratio at an output of said fiber, there is a greater four-wave mixing product suppression level than would be achieved injecting only said counter-propagating optical pump energy to obtain said desired gain level or 2) for a selected four-wave mixing product level, there is a higher signal to noise ratio than would be achieved using injecting only said counter-propagating optical energy to obtain said desired gain level.
13. The method of claim 12 further comprising:
further amplifying said signal within an Erbium-doped fiber amplifier.
14. In an optical communication system, apparatus for amplifying an optical signal within a fiber by exploiting Raman effects to achieve a desired gain level, said apparatus comprising:
means for injecting co-propagating optical pump energy into said fiber to cause Raman amplification according to a first gain level greater than 4 dB;
means for injecting counter-propagating optical pump energy into said fiber to cause Raman amplification according to a second gain level; and
wherein either 1) for a selected signal to noise ratio at an output of said fiber, there is a greater four-wave mixing product suppression level than would be achieved injecting only said counter-propagating optical pump energy to obtain said desired gain level or 2) for a selected four-wave mixing product level, there is a higher signal to noise ratio than would be achieved injecting only counter-propagating optical energy to obtain said desired gain level.
15. The apparatus of claim 14 further comprising:
means for further amplifying said signal within an Erbium-doped fiber amplifier.