Abstract: An optical connector plug includes an optical connector having an optical fiber built therein, and a cover member receiving the optical connector therein. The cover member includes a set of protrusions provided to protrude forward relative to a front end surface of the optical connector. A set of cutout portions as space portions are provided between the set of protrusions, and the set of cutout portions are arranged at locations opposing each other around the optical connector.

Abstract: An optical connector is an optical connector that is connected to another connector in a predetermined connection direction. The optical connector includes a ferrule that includes insertion holes into which guide pins to be connected to another connector are to be inserted; and a pin keeper 20 that is provided on a side of the ferrule opposite to the another connector and includes retaining holes 21 retaining the guide pins inserted into the insertion holes. The pin keeper 20 includes a pair of side portions 22 in which the retaining holes 21 are formed, and a bottom portion 23 that connects end portions of the pair of side portions 22. The retaining holes 21 are formed in a shape in which inside surfaces of the side portions 22 facing each other are notched.

Abstract: An optical connector plug includes an optical connector having an optical fiber built therein, and a cover member receiving the optical connector therein. The cover member includes a set of protrusions provided to protrude forward relative to a front end surface of the optical connector. A set of cutout portions as space portions are provided between the set of protrusions, and the set of cutout portions are arranged at locations opposing each other around the optical connector.

Abstract: An optical connector is an optical connector that is connected to another connector in a predetermined connection direction. The optical connector includes a ferrule that includes insertion holes into which guide pins to be connected to another connector are to be inserted; and a pin keeper 20 that is provided on a side of the ferrule opposite to the another connector and includes retaining holes 21 retaining the guide pins inserted into the insertion holes. The pin keeper 20 includes a pair of side portions 22 in which the retaining holes 21 are formed, and a bottom portion 23 that connects end portions of the pair of side portions 22. The retaining holes 21 are formed in a shape in which inside surfaces of the side portions 22 facing each other are notched.

Abstract: The present invention relates to an analog optical transmission system having a construction for expanding an analog transmittable distance. The analog optical transmission system includes: a light transmitter outputting analog optical signals such as image signals modulated in accordance with electrical signals multiplexed on a frequency domain; a transmission line including a SMF of 20 km or less in the total length; and a light receiver. A dispersion compensating fiber compensating for the chromatic dispersion of the transmission line is arranged on the transmission line, and the dispersion compensating fiber satisfies one of the first condition that the chromatic dispersion is set at ?250 ps/nm/km or less and a length is set at 1.1 km or less, and the condition that the chromatic dispersion is set at ?330 ps/nm/km or less and a length is set at 1.2 km or less. Optical suppressing devices reducing the MPI noise are arranged at the end portion of the dispersion compensating fiber.

Abstract: The present invention relates to an optical component and others in structure capable of implementing improved compensation for a gain slope. The optical component is equipped with first and second Mach-Zehnder interferometers. The first Mach-Zehnder interferometer is provided with a first temperature controller for controlling a temperature of at least one of a part of an optical main path and a first optical side path, while the second Mach-Zehnder interferometer 42 is also provided with a second temperature controller for controlling a temperature of at least one of a part of the optical main path and a second optical side path.

Abstract: The present invention relates to an analog optical transmission system having a construction for expanding an analog transmittable distance. The analog optical transmission system includes: a light transmitter outputting analog optical signals such as image signals modulated in accordance with electrical signals multiplexed on a frequency domain; a transmission line including a SMF of 20 km or less in the total length; and a light receiver. A dispersion compensating fiber compensating for the chromatic dispersion of the transmission line is arranged on the transmission line, and the dispersion compensating fiber satisfies one of the first condition that the chromatic dispersion is set at ?250 ps/nm/km or less and a length is set at 1.1 km or less, and the condition that the chromatic dispersion is set at ?330 ps/nm/km or less and a length is set at 1.2 km or less. Optical suppressing devices reducing the MPI noise are arranged at the end portion of the dispersion compensating fiber.

Abstract: An optical filter with improved ability to control a loss spectrum and an optical amplifier using the same are provided. The optical filter includes a first optical element with a first loss spectrum and a second optical element with a second loss spectrum which are connected together in series between an input port and an output port. The optical filter provides a predetermined loss to input light. A loss control unit controls the overall loss spectrum by shifting the first and second loss spectra in the same direction with respect to wavelength or by shifting only one of the loss spectra.

Abstract: The present invention relates to an optical component and others in structure capable of implementing improved compensation for a gain slope. The optical component is equipped with first and second Mach-Zehnder interferometers. The first Mach-Zehnder interferometer is provided with a first temperature controller for controlling a temperature of at least one of a part of an optical main path and a first optical side path, while the second Mach-Zehnder interferometer 42 is also provided with a second temperature controller for controlling a temperature of at least one of a part of the optical main path and a second optical side path.