Abstract: A wavelength-variable light source apparatus having a wavelength calibration function of emitted light therefrom.

Abstract: A wavelength tunable light source equipment provided with an external resonator light source having a wavelength selection structure inside it and lasing by a wavelength selected by this and a light path changer introducing at least part of the light emitted from the external resonator light source and including a spontaneous emitted light ingredient to the wavelength selection structure so that a wavelength of the light emitted from the external resonator light source and a wavelength selected by the wavelength selection structure become synchronized. Of the light emitted from the external resonator light source, the light introduced to the wavelength selection structure through the light path changer and emitted from it is made the output light.

Abstract: Light under measurement whose wavelength is continuously swept is incident on fiber-optic Etalon. The fiber-optic Etalon transmits the light under measurement each time the wavelength of the light under measurement satisfies specific conditions. A PD detects the transmitted light of the fiber-optic Etalon and outputs the intensity of the light under measurement. A counter counts the number of peaks of the output of the PD. A CPU calculates the wavelength of the light under measurement based on the count value of the counter.

Abstract: Lenses 102, 103, and 104, a diffraction grating 105, a mirror 106, a light isolator 107, an arm 108, a pulse motor 109, and a pulse motor 110 operate in conjunction for mechanically roughly adjusting the wavelength of laser light generated by an LD 101, and the wavelength of laser light generated by the LD 101 is electrically finely adjusted in a wavelength adjustment section 30.

Abstract: In a tunable laser source device for branching a light output from a tunable laser source portion 1 to supply to a wavelength measuring device 6 and a wavelength calibrating reference device 5 and then controlling the tunable laser source portion in response to an output of the wavelength measuring device, at least one peak and one notch or two peaks or two notches or more in a measurement interference period of the wavelength measuring device are included between a plurality of reference wavelengths of the wavelength calibrating reference device.

Abstract: A wavelength-variable light source apparatus having a wavelength calibration function of emitted light therefrom.

Abstract: A wavelength-variable light source apparatus having a wavelength measurement function for measuring the wavelength characteristic of an object to be measured. In the apparatus, a CPU outputs control signals for controlling components of a light power meter section via a bus for controlling a light detection operation. When the CPU obtains light detection level data detected by the light power meter section from light passing through an object to be measured, the CPU stores the light detection level data for each wavelength in the object to be measured in an RAM and causes a display control section to display the light detection level on a display section.

Abstract: A wavelength tunable light source equipment provided with an external resonator light source having a wavelength selection structure inside it and lasing by a wavelength selected by this and a light path changer introducing at least part of the light emitted from the external resonator light source and including a spontaneous emitted light ingredient to the wavelength selection structure so that a wavelength of the light emitted from the external resonator light source and a wavelength selected by the wavelength selection structure become synchronized. Of the light emitted from the external resonator light source, the light introduced to the wavelength selection structure through the light path changer and emitted from it is made the output light.

Abstract: A wavelength-variable light source apparatus having a wavelength calibration function of emitted light therefrom.

Abstract: In order to start sweeping an optical spectrum analyzer 1 and a wavelength tunable light source 14 on the same timing, a motor 6 for driving a spectroscope 4 in the optical spectrum analyzer 1 is controlled. To this end, a drive circuit 7 outputs a control signal to determine the timing where the motor 6 starts to rotate. A wavelength control circuit 19 in the wavelength tunable light source 14 controls the sweep of the wavelength of single-mode oscillation from a light source unit 20 and starts sweeping the light source unit 20 in response to a signal externally supplied to control the timing of sweep start. As a result, the sweep of the wavelength being measured with the optical spectrum analyzer 1 and that of the wavelength of single-mode oscillation from the wavelength tunable light source 14 are started on the same timing and high-speed sweep is achieved.

Abstract: In a tunable laser source device for branching a light output from a tunable laser source portion 1 to supply to a wavelength measuring device 6 and a wavelength calibrating reference device 5 and then controlling the tunable laser source portion in response to an output of the wavelength measuring device, at least one peak and one notch or two peaks or two notches or more in a measurement interference period of the wavelength measuring device are included between a plurality of reference wavelengths of the wavelength calibrating reference device.

Abstract: A tunable laser source for continually changing the wavelength of output light by means of changing the length of an external cavity of an external cavity-type semiconductor laser light source section includes laser diode current control section 7, 8 for controlling a drive current supplied to a laser diode 1 as section for changing the length of the external cavity for preventing occurrence of mode hopping which arises as a result of continual changes in the wavelength of output light.

Abstract: Lenses 102, 103, and 104, a diffraction grating 105, a mirror 106, a light isolator 107, an arm 108, a pulse motor 109, and a pulse motor 110 operate in conjunction for mechanically roughly adjusting the wavelength of laser light generated by an LD 101, and the wavelength of laser light generated by the LD 101 is electrically finely adjusted in a wavelength adjustment section 30.

Abstract: Light under measurement whose wavelength is continuously swept is incident on fiber-optic Etalon. The fiber-optic Etalon transmits the light under measurement each time the wavelength of the light under measurement satisfies specific conditions. A PD detects the transmitted light of the fiber-optic Etalon and outputs the intensity of the light under measurement. A counter counts the number of peaks of the output of the PD. A CPU calculates the wavelength of the light under measurement based on the count value of the counter.

Abstract: The present invention provides an external resonator light source which, by removing natural emitted light, is able to send out only light which has an extremely high wavelength purity. As shown in FIG. 1, the present invention's external resonator light source is provided with a light amplifying element 21; a first light reflecting means 22 disposed to the side of one outgoing light edge surface 21a of the light amplifying element 21; a wavelength selecting element 23 disposed to the side of the other outgoing light edge surface 21b of the light amplifying element 21; and a second light reflecting means 24 which reflects and/or transmits outgoing light 31a from the wavelength selecting element 23, and which, together with the first light reflecting means 22, forms a light resonator; wherein outgoing light from the wavelength selecting element 23 is output as transmitted light 32 from the second light reflecting means 24.

Abstract: An external resonator type laser light source provides plural diffraction gratings GR1 and GR2.

Abstract: A wavelength-variable light source apparatus having a wavelength measurement function for measuring the wavelength characteristic of an object to be measured. In the apparatus, a CPU outputs control signals for controlling components of a light power meter section via a bus for controlling a light detection operation. When the CPU obtains light detection level data detected by the light power meter section from light passing through an object to be measured, the CPU stores the light detection level data for each wavelength in the object to be measured in an RAM and causes a display control section to display the light detection level on a display section.

Abstract: A variable wavelength laser light source to improve the resolution of the outgoing light and output only pure laser light without the natural emitted light has an optical amplification element (laser) 11, a first optical reflector 12 at one end surface 11a of the optical amplification element 11, and a wavelength selection element (diffraction grating) 13 at the other end surface 11b of the optical amplification element 11 which selects and outputs the desired wavelength light emitted by the optical amplification element 11. A second optical reflector 14 receives the outgoing light from the wavelength selection element 13 to form the optical resonator with the first optical reflector 12. A first rotating mechanism 15 rotates the second optical reflector 14 around its axis, and a second rotating mechanism 16 connected to the first rotating mechanism 15 rotates the second optical reflector 14 around a second axis 16a remote from the second optical reflector 14 by rotating the first rotating mechanism.

Abstract: A temperature controller of an optical module package comprises an optical element and first thermistor fixedly held over a first Peltier element housed in an optical module package with a base interposed therebetween; a second thermistor housed in the optical module package; and a second Peltier element with the optical module package fixedly attached thereon with a mount interposed therebetween. While temperature control of the optical module package is achieved by monitoring the temperature of the optical module package with the second thermistor and controlling the second Peltier element, temperature control of the optical element is achieved by monitoring the temperature of the optical element with the first thermistor and controlling the first Peltier element. The temperature controller of the optical module package is impervious to the effect of open air temperature and capable of saving required space.