Cypress Tam - Academia.edu (original) (raw)
Related Authors
Institute of applied physics of russian academy of sciences
Uploads
Papers by Cypress Tam
IEEE Photonics Technology Letters, 1998
We report a tunable dual-wavelength-switching fiber grating laser by exploiting the large homogen... more We report a tunable dual-wavelength-switching fiber grating laser by exploiting the large homogeneous gain broadening in erbium (Er)-doped fiber to suppress simultaneous lasing. Wavelength switching was accomplished through a novel design which has two overlapping cavities sharing a single-gain medium.
IEEE Photonics Technology Letters, 1998
Large absorption of 980-nm pumping in Er-Ybdoped fibers causes significant temperature differenti... more Large absorption of 980-nm pumping in Er-Ybdoped fibers causes significant temperature differentials along small length of the fibers. When pumped with 40 mW of power, unequal Bragg wavelength shifts of 0.25 and 0.16 nm were measured in the respective 6-and 10-mm-long Bragg reflectors constructed around the Er-Yb core of a 2.5-cm-long DBR laser. This causes large fluctuation in the laser's output power. Stable operation resumed with increased pump power. At 68 mW of pump power, 0.32-nm shift in lasing wavelength (corresponding to a temperature rise of 38 C) was measured in the distributed Bragg reflector fiber laser.
IEEE Photonics Technology Letters, 1998
We report a tunable dual-wavelength-switching fiber grating laser by exploiting the large homogen... more We report a tunable dual-wavelength-switching fiber grating laser by exploiting the large homogeneous gain broadening in erbium (Er)-doped fiber to suppress simultaneous lasing. Wavelength switching was accomplished through a novel design which has two overlapping cavities sharing a single-gain medium. The loss corresponding to one of the lasing wavelengths can be modulated via an optical chopper. Output power of about 6 mW and extinction ratio up to 50 dB were observed. The lasing wavelengths were tunable and switching was demonstrated for wavelength separations ranging from 0.35 to 23.5 nm.
IEEE Photonics Technology Letters, 1998
Large absorption of 980-nm pumping in Er-Ybdoped fibers causes significant temperature differenti... more Large absorption of 980-nm pumping in Er-Ybdoped fibers causes significant temperature differentials along small length of the fibers. When pumped with 40 mW of power, unequal Bragg wavelength shifts of 0.25 and 0.16 nm were measured in the respective 6-and 10-mm-long Bragg reflectors constructed around the Er-Yb core of a 2.5-cm-long DBR laser. This causes large fluctuation in the laser's output power. Stable operation resumed with increased pump power. At 68 mW of pump power, 0.32-nm shift in lasing wavelength (corresponding to a temperature rise of 38 C) was measured in the distributed Bragg reflector fiber laser.
IEEE Photonics Technology Letters, 1999
Heating of the Er/Yb-codoped fiber lasers due to strong pump absorption was found to cause large ... more Heating of the Er/Yb-codoped fiber lasers due to strong pump absorption was found to cause large frequency fluctuation in addition to lasing wavelength shift. Laser frequency fluctuation of up to 1.7 GHz was measured by using an absorption line of an acetylene gas cell. The large frequency fluctuation was reduced to less than 80 MHz with proper cooling of the laser.
IEEE Photonics Technology Letters, 1999
Heating of the Er/Yb-codoped fiber lasers due to strong pump absorption was found to cause large ... more Heating of the Er/Yb-codoped fiber lasers due to strong pump absorption was found to cause large frequency fluctuation in addition to lasing wavelength shift. Laser frequency fluctuation of up to 1.7 GHz was measured by using an absorption line of an acetylene gas cell. The large frequency fluctuation was reduced to less than 80 MHz with proper cooling of the laser.
IEEE Photonics Technology Letters, 1998
We report a tunable dual-wavelength-switching fiber grating laser by exploiting the large homogen... more We report a tunable dual-wavelength-switching fiber grating laser by exploiting the large homogeneous gain broadening in erbium (Er)-doped fiber to suppress simultaneous lasing. Wavelength switching was accomplished through a novel design which has two overlapping cavities sharing a single-gain medium.
IEEE Photonics Technology Letters, 1998
Large absorption of 980-nm pumping in Er-Ybdoped fibers causes significant temperature differenti... more Large absorption of 980-nm pumping in Er-Ybdoped fibers causes significant temperature differentials along small length of the fibers. When pumped with 40 mW of power, unequal Bragg wavelength shifts of 0.25 and 0.16 nm were measured in the respective 6-and 10-mm-long Bragg reflectors constructed around the Er-Yb core of a 2.5-cm-long DBR laser. This causes large fluctuation in the laser's output power. Stable operation resumed with increased pump power. At 68 mW of pump power, 0.32-nm shift in lasing wavelength (corresponding to a temperature rise of 38 C) was measured in the distributed Bragg reflector fiber laser.
IEEE Photonics Technology Letters, 1998
We report a tunable dual-wavelength-switching fiber grating laser by exploiting the large homogen... more We report a tunable dual-wavelength-switching fiber grating laser by exploiting the large homogeneous gain broadening in erbium (Er)-doped fiber to suppress simultaneous lasing. Wavelength switching was accomplished through a novel design which has two overlapping cavities sharing a single-gain medium. The loss corresponding to one of the lasing wavelengths can be modulated via an optical chopper. Output power of about 6 mW and extinction ratio up to 50 dB were observed. The lasing wavelengths were tunable and switching was demonstrated for wavelength separations ranging from 0.35 to 23.5 nm.
IEEE Photonics Technology Letters, 1998
Large absorption of 980-nm pumping in Er-Ybdoped fibers causes significant temperature differenti... more Large absorption of 980-nm pumping in Er-Ybdoped fibers causes significant temperature differentials along small length of the fibers. When pumped with 40 mW of power, unequal Bragg wavelength shifts of 0.25 and 0.16 nm were measured in the respective 6-and 10-mm-long Bragg reflectors constructed around the Er-Yb core of a 2.5-cm-long DBR laser. This causes large fluctuation in the laser's output power. Stable operation resumed with increased pump power. At 68 mW of pump power, 0.32-nm shift in lasing wavelength (corresponding to a temperature rise of 38 C) was measured in the distributed Bragg reflector fiber laser.
IEEE Photonics Technology Letters, 1999
Heating of the Er/Yb-codoped fiber lasers due to strong pump absorption was found to cause large ... more Heating of the Er/Yb-codoped fiber lasers due to strong pump absorption was found to cause large frequency fluctuation in addition to lasing wavelength shift. Laser frequency fluctuation of up to 1.7 GHz was measured by using an absorption line of an acetylene gas cell. The large frequency fluctuation was reduced to less than 80 MHz with proper cooling of the laser.
IEEE Photonics Technology Letters, 1999
Heating of the Er/Yb-codoped fiber lasers due to strong pump absorption was found to cause large ... more Heating of the Er/Yb-codoped fiber lasers due to strong pump absorption was found to cause large frequency fluctuation in addition to lasing wavelength shift. Laser frequency fluctuation of up to 1.7 GHz was measured by using an absorption line of an acetylene gas cell. The large frequency fluctuation was reduced to less than 80 MHz with proper cooling of the laser.