Rolando P Espindola6033 Sheridan Rd, Chicago, IL 60660

6507429, Jan 14, 2003

Aug 26, 1999

09/383700

Gaelle Ales - Summit NJ
Rolando Patricio Espindola - Chatham NJ
Thomas Andrew Strasser - Warren NJ

Agere Systems Inc. - Allentown PA

H01S 300

3593411, 372 6

A novel superfluorescent fiber source (SFS) has high power and broad bandwidth, and can advantageously be used in a variety of applications, e. g. , optical coherent tomography systems, sliced spectrum optical fiber communication systems, and optical position sensing systems. The novel SFS comprises a first and a second length of rare earth-doped optical fiber, with an optical isolator therebetween. Light from a first pump source is provided to the first length of optical fiber, and light from a second pump source is provided to the second length of optical fiber. An optional reflector is disposed to reflect at least some upstream-propagating light back into the first length of optical fiber, whereby generation of long-wavelength amplified spontaneous emission (ASE) is facilitated. The long-wavelength ASE is transmitted through the optical isolator to the second length of rare earth-doped optical fiber, where broadband ASE is generated and the long-wavelength ASE is amplified. The resulting ASE is provided to utilization means.

2003004, Mar 6, 2003

Jan 30, 2002

10/060688

Naresh Chand - Warren NJ, US
Keisuke Kojima - Bridgewater NJ, US
Thomas Beck Mason - Bethlehem PA, US
Jianjun Yu - Murray Hill NJ, US
Rolando Espindola - Basking Ridge NJ, US

H04J014/08
H04B010/06

359/135000, 359/189000

Simultaneous demultiplexing and clock recovery of high-speed (e.g., 80 Gbps or 160 Gbps) optical time division multiplexing (OTDM) signals is achieved using a tandem electro-absorption modulator (TEAM). The TEAM has a monolithically integrated SOA to compensate the insertion loss and two EAMs to reduce the switching window. The demultiplexing and clock recovery may be performed by a single TEAM, or by two or more TEAMs. A fiber Raman amplifier may be used to boost the intensity of the OTDM signals during transmission.

6181852, Jan 30, 2001

Jan 26, 1999

9/237124

Laura Ellen Adams - Basking Ridge NJ
Benjamin John Eggleton - Berkeley Heights NJ
Rolando Patricio Espindola - Chatham NJ
Sungho Jin - Millington NJ
Hareesh Mavoori - Berkeley Heights NJ
John A. Rogers - New Providence NJ
Thomas Andrew Strasser - Warren NJ

Lucent Technologies Inc. - Murray Hill NJ

G02B 634

385 37

A tunable chromatic dispersion compensator for optical communication systems is disclosed. An optical grating, such as a fiber Bragg grating, non-chirped, linearly chirped or non-linearly chirped, is coated on its outer surface with a coating have a variable diameter and strained is applied to the fiber. The fiber may be latchably strained so that the grating characteristics may be changed or tuned while avoiding use of a continuous power supply. Various optical networking applications using such dispersion compensating devices are also disclosed.

6128427, Oct 3, 2000

Aug 28, 1998

9/141906

Rolando Patricio Espindola - Chatham NJ
Sungho Jin - Millington NJ
Hareesh Mavoori - Berkeley Heights NJ

Lucent Technologies Inc. - Murray Hill NJ

G02B 626

385 37

The invention discloses digitally tunable optical grating device using force between switchable and nonswitchable magnets to reconfigure the mechanical strain, preferably a tensile strain, or gratings so that a pulse or short-duration current can induce a latchable change in grating periodicity. Preferred embodiments include fiber gratings with magnet gaps dimensioned for limiting the maximum strain applied to the grating and guides for providing strain without rotation or twisting. The magnets provide an accurately predetermined amount of strain and hence provide a latchable wavelength shift in the grating with a minimal amount of electrical power. The device is especially useful in WDM communication systems, particularly for adding or dropping channels and for dynamically equalizing amplifier gain.

6049414, Apr 11, 2000

Nov 20, 1998

9/197396

Rolando Patricio Espindola - Chatham NJ
Thomas Andrew Strasser - Warren NJ
Jefferson Lynn Wagener - Aberdeen WA
Paul Francis Wysocki - Flemington NJ

Lucent Technologies Inc. - Murray Hill NJ

G02B 634
H01S 330
H04J 1402

359337

In accordance with the invention, a temperature-dependent rare earth doped waveguide optical amplifier is compensated by a temperature-dependent loss filter. The filter characteristics are designed to be temperature-dependent filters so that the gain characteristic of the amplifier is compensated over a practical operating temperature range. In essence, the amplifier comprises a length of optical waveguide for transmitting optical signals, a rare earth doped amplifying region in the waveguide for amplifying the transmitted optical signals, a pumping source for optically pumping the amplifying region, and a temperature-dependent loss filter. A typical design compensates an EFDA to a variation of less than 1 dB over a temperature range of -40. degree. C. to 85. degree. C. and a spectral range of at least 20 nm.

6301408, Oct 9, 2001

Sep 24, 1998

9/152893

Rolando Patricio Espindola - Chatham NJ
Andrew John Stentz - Clinton NJ
Jefferson Lynn Wagener - Aberdeen WA

Lucent Technologies Inc - Murray Hill NJ

G02B 634

385 37

An optical fiber grating device including a length of optical fiber having a predetermined fundamental mode effective guide index and a longitudinally tapered region for accessing a fundamental mode of light. The tapered region has a grating with a predetermined light spectral shaping property that shapes the light spectrum of the fundamental mode. A coating surrounds the tapered region of the fiber for modifying the fundamental mode effective guide index of the fiber in order to change the spectral shaping property of the grating.

5953471, Sep 14, 1999

Jul 1, 1997

8/886783

Rolando Patricio Espindola - West Orange NJ
Ashish Madhukar Vengsarkar - Berkeley Heights NJ
Jefferson Lynn Wagener - Charlottesville VA

Lucent Technologies, Inc. - Murray Hill NJ

G02B 634

385 37

Embodiments of the invention include a method for fabricating Bragg reflector gratings using an amplitude mask and an amplitude mask apparatus for fabricating Bragg reflectors. The inventive Bragg reflector gratings have periodicities greater than conventional short period gratings but much less than conventional long period gratings. Short period, Bragg reflector gratings according to embodiments of the invention have periodicities, e. g. , within the range from 1. mu. m to 10. mu. m. The fabrication method includes positioning an amplitude mask having appropriate slits formed therein over the photosensitive waveguide of interest and then illuminating the waveguide through the slits thereby photoinducing a periodic pattern of refractive index perturbations characteristic of a Bragg reflector. The short period, Bragg grating produced by the inventive amplitude mask is a reflective grating whose reflection characteristics approach approximately 99. 99%. Reflective gratings fabricated in accordance with embodiments of the invention are useful in adding and dropping channels in wavelength division multiplexed systems and in applications such as laser stabilization and structural integrity sensing.

6148127, Nov 14, 2000

Sep 23, 1998

9/159178

Laura Ellen Adams - Basking Ridge NJ
Benjamin John Eggleton - Berkeley Heights NJ
Rolando Patricio Espindola - Chatham NJ
Sungho Jin - Millington NJ
Hareesh Mavoori - Berkeley Heights NJ
John A. Rogers - New Providence NJ
Thomas Andrew Strasser - Warren NJ

Lucent Technologies Inc. - Murray Hill NJ

G02B 634

385 37

A tunable chromatic dispersion compensator for optical communication systems is disclosed. An optical grating, such as a fiber Bragg grating, nonchirped, linearly chirped or non-linearly chirped, is strained to alter the dispersion compensator characteristics, preferably with a gradient-generating body bonded onto the length of the fiber grating. The body may be latchably strained so that the grating characteristics may be changed or tuned while avoiding use of a continuous power supply. Various optical networking applications using such dispersion compensating devices are also disclosed.